Common Weakness Enumeration

CWE-79

Allowed

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Abstraction: Base · Status: Stable

API response cwe.mitre.org

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

68579 vulnerabilities reference this CWE, most recent first.

GHSA-MHMP-MQJW-37RH

Vulnerability from github – Published: 2024-07-15 03:30 – Updated: 2024-07-15 03:30
VLAI
Details

IBM Datacap Navigator 9.1.5, 9.1.6, 9.1.7, 9.1.8, and 9.1.9 is vulnerable to stored cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 295967.

Severity
6.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2024-39728"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-15T02:15:05Z",
    "severity": "MODERATE"
  },
  "details": "IBM Datacap Navigator 9.1.5, 9.1.6, 9.1.7, 9.1.8, and 9.1.9 is vulnerable to stored cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.  IBM X-Force ID:  295967.",
  "id": "GHSA-mhmp-mqjw-37rh",
  "modified": "2024-07-15T03:30:57Z",
  "published": "2024-07-15T03:30:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-39728"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/295967"
    },
    {
      "type": "WEB",
      "url": "https://www.ibm.com/support/pages/node/7160185"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-MHMQ-23X2-3CF7

Vulnerability from github – Published: 2022-05-17 02:09 – Updated: 2022-05-17 02:09
VLAI
Details

Cross-site scripting (XSS) vulnerability in the Workflow module 5.x-2.x before 5.x-2.6 and 6.x-1.x before 6.x-1.4 for Drupal, when used with the Token module, might allow remote authenticated users to inject arbitrary web script or HTML via a certain Comment field.

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{
  "affected": [],
  "aliases": [
    "CVE-2010-1539"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2010-04-26T19:30:00Z",
    "severity": "LOW"
  },
  "details": "Cross-site scripting (XSS) vulnerability in the Workflow module 5.x-2.x before 5.x-2.6 and 6.x-1.x before 6.x-1.4 for Drupal, when used with the Token module, might allow remote authenticated users to inject arbitrary web script or HTML via a certain Comment field.",
  "id": "GHSA-mhmq-23x2-3cf7",
  "modified": "2022-05-17T02:09:08Z",
  "published": "2022-05-17T02:09:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2010-1539"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/56638"
    },
    {
      "type": "WEB",
      "url": "http://drupal.org/node/731624"
    },
    {
      "type": "WEB",
      "url": "http://drupal.org/node/731644"
    },
    {
      "type": "WEB",
      "url": "http://drupal.org/node/731648"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/38825"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/38520"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-MHMQ-PC5M-24FF

Vulnerability from github – Published: 2024-11-26 18:38 – Updated: 2024-11-26 18:38
VLAI
Details

The Formidable Forms WordPress plugin before 6.14.1 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2024-9768"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-21T11:15:37Z",
    "severity": "MODERATE"
  },
  "details": "The Formidable Forms  WordPress plugin before 6.14.1 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).",
  "id": "GHSA-mhmq-pc5m-24ff",
  "modified": "2024-11-26T18:38:51Z",
  "published": "2024-11-26T18:38:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-9768"
    },
    {
      "type": "WEB",
      "url": "https://wpscan.com/vulnerability/3c4ff11b-4a06-433d-8f0e-4069865721c0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-MHP5-9HJJ-MHRX

Vulnerability from github – Published: 2022-05-17 04:07 – Updated: 2022-05-17 04:07
VLAI
Details

Cross-site scripting (XSS) vulnerability in the Web Inbox in Cisco Unity Connection 8.6(2a)SU3 and earlier allows remote attackers to inject arbitrary web script or HTML via an unspecified parameter, aka Bug ID CSCui33028.

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{
  "affected": [],
  "aliases": [
    "CVE-2014-2125"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2014-04-02T03:58:00Z",
    "severity": "MODERATE"
  },
  "details": "Cross-site scripting (XSS) vulnerability in the Web Inbox in Cisco Unity Connection 8.6(2a)SU3 and earlier allows remote attackers to inject arbitrary web script or HTML via an unspecified parameter, aka Bug ID CSCui33028.",
  "id": "GHSA-mhp5-9hjj-mhrx",
  "modified": "2022-05-17T04:07:32Z",
  "published": "2022-05-17T04:07:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-2125"
    },
    {
      "type": "WEB",
      "url": "http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-2125"
    },
    {
      "type": "WEB",
      "url": "http://tools.cisco.com/security/center/viewAlert.x?alertId=33603"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1029988"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-MHP6-PXH8-R675

Vulnerability from github – Published: 2020-06-18 14:19 – Updated: 2025-11-20 19:31
VLAI
Summary
Angular vulnerable to Cross-site Scripting
Details

angular.js prior to 1.8.0 allows cross site scripting. The regex-based input HTML replacement may turn sanitized code into unsanitized one. Wrapping <option> elements in <select> ones changes parsing behavior, leading to possibly unsanitizing code.

Severity
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "angular"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-7676"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-18T14:09:41Z",
    "nvd_published_at": "2020-06-08T14:15:13Z",
    "severity": "MODERATE"
  },
  "details": "angular.js prior to 1.8.0 allows cross site scripting. The regex-based input HTML replacement may turn sanitized code into unsanitized one. Wrapping `\u003coption\u003e` elements in `\u003cselect\u003e` ones changes parsing behavior, leading to possibly unsanitizing code.",
  "id": "GHSA-mhp6-pxh8-r675",
  "modified": "2025-11-20T19:31:06Z",
  "published": "2020-06-18T14:19:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7676"
    },
    {
      "type": "WEB",
      "url": "https://github.com/angular/angular.js/pull/17028"
    },
    {
      "type": "WEB",
      "url": "https://github.com/angular/angular.js/commit/2df43c07779137d1bddf7f3b282a1287a8634acd"
    },
    {
      "type": "WEB",
      "url": "https://snyk.io/vuln/SNYK-JS-ANGULAR-570058"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rfa2b19d01d10a8637dc319a7d5994c3dbdb88c0a8f9a21533403577a@%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rfa2b19d01d10a8637dc319a7d5994c3dbdb88c0a8f9a21533403577a%40%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rda99599896c3667f2cc9e9d34c7b6ef5d2bbed1f4801e1d75a2b0679@%3Ccommits.nifi.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rda99599896c3667f2cc9e9d34c7b6ef5d2bbed1f4801e1d75a2b0679%40%3Ccommits.nifi.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rb6423268b25db0f800359986867648e11dbd38e133b9383e85067f02@%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rb6423268b25db0f800359986867648e11dbd38e133b9383e85067f02%40%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r80f210a5f4833d59c5d3de17dd7312f9daba0765ec7d4052469f13f1@%3Cozone-commits.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r80f210a5f4833d59c5d3de17dd7312f9daba0765ec7d4052469f13f1%40%3Cozone-commits.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r79e3feaaf87b81e80da0e17a579015f6dcb94c95551ced398d50c8d7@%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r79e3feaaf87b81e80da0e17a579015f6dcb94c95551ced398d50c8d7%40%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r57383582dcad2305430321589dfaca6793f5174c55da6ce8d06fbf9b@%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r57383582dcad2305430321589dfaca6793f5174c55da6ce8d06fbf9b%40%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r455ebd83a1c69ae8fd897560534a079c70a483dbe1e75504f1ca499b@%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r455ebd83a1c69ae8fd897560534a079c70a483dbe1e75504f1ca499b%40%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r446c297cd6cda2bd7e345c9b0741d7f611df89902e5d515848c6f4b1@%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r446c297cd6cda2bd7e345c9b0741d7f611df89902e5d515848c6f4b1%40%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r3f05cfd587c774ea83c18e59eda9fa37fa9bbf3421484d4ee1017a20@%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r3f05cfd587c774ea83c18e59eda9fa37fa9bbf3421484d4ee1017a20%40%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r198985c02829ba8285ed4f9b1de54a33b5f31b08bb38ac51fc86961b@%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r198985c02829ba8285ed4f9b1de54a33b5f31b08bb38ac51fc86961b%40%3Cozone-issues.hadoop.apache.org%3E"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/angular/angular.js"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Angular vulnerable to Cross-site Scripting"
}

GHSA-MHP7-3393-PFQR

Vulnerability from github – Published: 2022-06-24 00:00 – Updated: 2022-12-06 00:02
VLAI
Summary
Cross-site Scripting vulnerability in Jenkins
Details

Since Jenkins 2.340, symbol-based icons unescape previously escaped values of tooltip parameters.

This vulnerability is known to be exploitable by attackers with Job/Configure permission.

Jenkins 2.356, LTS 2.332.4 and LTS 2.346.1 addresses this vulnerability. Symbol-based icons no longer unescape values of tooltip parameters.

Severity
8.0 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.jenkins-ci.main:jenkins-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.340"
            },
            {
              "fixed": "2.356"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.jenkins-ci.main:jenkins-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.332"
            },
            {
              "fixed": "2.332.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-34172"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-12-06T00:02:19Z",
    "nvd_published_at": "2022-06-23T17:15:00Z",
    "severity": "HIGH"
  },
  "details": "Since Jenkins 2.340, symbol-based icons unescape previously escaped values of `tooltip` parameters.\n\nThis vulnerability is known to be exploitable by attackers with Job/Configure permission.\n\nJenkins 2.356, LTS 2.332.4 and LTS 2.346.1 addresses this vulnerability. Symbol-based icons no longer unescape values of `tooltip` parameters.",
  "id": "GHSA-mhp7-3393-pfqr",
  "modified": "2022-12-06T00:02:19Z",
  "published": "2022-06-24T00:00:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-34172"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jenkinsci/jenkins"
    },
    {
      "type": "WEB",
      "url": "https://www.jenkins.io/security/advisory/2022-06-22/#SECURITY-2781"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Cross-site Scripting vulnerability in Jenkins"
}

GHSA-MHP9-HC33-RQWJ

Vulnerability from github – Published: 2022-11-09 12:00 – Updated: 2022-11-17 03:30
VLAI
Details

Cross-site scripting vulnerability in Mitsubishi Electric consumer electronics products (Air Conditioning, Wi-Fi Interface, Refrigerator, HEMS adapter, Remote control with Wi-Fi Interface, BATHROOM THERMO VENTILATOR, Rice cooker, Mitsubishi Electric HEMS control adapter, Energy Recovery Ventilator, Smart Switch and Air Purifier) allows a remote unauthenticated attacker to execute an malicious script on a user's browser to disclose information, etc. The wide range of models/versions of Mitsubishi Electric consumer electronics products are affected by this vulnerability. As for the affected product models/versions, see the Mitsubishi Electric's advisory which is listed in [References] section.

Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2022-33322"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-11-08T20:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Cross-site scripting vulnerability in Mitsubishi Electric consumer electronics products (Air Conditioning, Wi-Fi Interface, Refrigerator, HEMS adapter, Remote control with Wi-Fi Interface, BATHROOM THERMO VENTILATOR, Rice cooker, Mitsubishi Electric HEMS control adapter, Energy Recovery Ventilator, Smart Switch and Air Purifier) allows a remote unauthenticated attacker to execute an malicious script on a user\u0027s browser to disclose information, etc. The wide range of models/versions of Mitsubishi Electric consumer electronics products are affected by this vulnerability. As for the affected product models/versions, see the Mitsubishi Electric\u0027s advisory which is listed in [References] section.",
  "id": "GHSA-mhp9-hc33-rqwj",
  "modified": "2022-11-17T03:30:49Z",
  "published": "2022-11-09T12:00:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-33322"
    },
    {
      "type": "WEB",
      "url": "https://jvn.jp/vu/JVNVU96767562/index.html"
    },
    {
      "type": "WEB",
      "url": "https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2022-011.pdf"
    },
    {
      "type": "WEB",
      "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-011_en.pdf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-MHPF-H92V-4WV4

Vulnerability from github – Published: 2022-05-14 01:54 – Updated: 2022-05-14 01:54
VLAI
Details

DedeCMS 5.7 SP2 allows XSS via the plus/qrcode.php type parameter.

Severity
6.1 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2018-18578"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-10-22T21:29:00Z",
    "severity": "MODERATE"
  },
  "details": "DedeCMS 5.7 SP2 allows XSS via the plus/qrcode.php type parameter.",
  "id": "GHSA-mhpf-h92v-4wv4",
  "modified": "2022-05-14T01:54:08Z",
  "published": "2022-05-14T01:54:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-18578"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ky-j/dedecms/issues/5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ky-j/dedecms/files/2500328/Reflected.XSS.Vulnerability.exists.in.the.file.of.DedeCMS.V5.docx"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-MHPG-C27V-6MXR

Vulnerability from github – Published: 2026-01-08 20:16 – Updated: 2026-01-08 20:16
VLAI
Summary
NiceGUI apps which use `ui.sub_pages` vulnerable to zero-click XSS
Details

Summary

An unsafe implementation in the pushstate event listener used by ui.sub_pages allows an attacker to manipulate the fragment identifier of the URL, which they can do despite being cross-site, using an iframe.

Details

The problem is traced as follows:

  1. On pushstate, handleStateEvent is executed.

https://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/elements/sub_pages.js#L38-L39

  1. handleStateEvent emits sub_pages_open event.

https://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/elements/sub_pages.js#L22-L25

  1. SubPagesRouter (used by ui.sub_pages), lisnening on sub_pages_open, _handle_open runs.

https://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/sub_pages_router.py#L18-L22

  1. _handle_open finds any SubPages and runs _show() on them

https://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/sub_pages_router.py#L63-L71

  1. If the if-logic is followed or debug prints are added, it can be found that it calls self._handle_scrolling(match, behavior='smooth') directly

https://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/elements/sub_pages.py#L76-L100

  1. CULPRIT _handle_scrolling runs _scroll_to_fragment as there is a fragment, which runs vulnerable JS if the fragment (attacker-controlled) escapes out of the quotes.

https://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/elements/sub_pages.py#L206-L217

PoC

Just visiting this page (no click required), consistently triggers XSS in https://nicegui.io domain. 

<html>
  <body>
    <iframe id="myiframe" src="https://nicegui.io" width="100%" height="600px" onload="triggerXSS()"></iframe>
    <script>
      function triggerXSS() {
        if (!myiframe.src.includes("#")) {
          myiframe.src = "https://nicegui.io#x');alert(document.domain)//";
        }
      }
    </script>
  </body>
</html>

image

Impact

Any page which uses ui.sub_pages and does not actively prevent itself from being put in an iframe is affected.

The impact is high since by-default NiceGUI pages are iframe-embeddable with no native opt-out functionalities except by manipulating the underlying app via FastAPI methods, and that ui.sub_pages is actively promoted as the new modern way to create Single-Page Applications (SPA).

Patch

  1. Not use ui.sub_pages
  2. Block iframe with the following code
@app.middleware('http')
async def iframe_blocking_middleware(request, call_next):
    response = await call_next(request)
    response.headers['X-Frame-Options'] = 'DENY'
    return response

Appendix

AI is used safely to judge the CVSS scoring (input is censored).

Please find the results in https://poe.com/s/3FXuwp7TAYxqLomARXma

Scoring update after manual review

The scoring done by AI was quite biased. Upon further review it is less dramatic.

  • User Interaction None: There's almost no interaction required, and none of the interaction is with the vulnerable system.
  • Confidentiality & Integrity Low: The extent of data confidentiality & integrity loss is bounded by the highest priviledged user in the entire NiceGUI application. There does not exist a means of performing data manipulating tasks that said admin cannot already do.
  • Availability None: No DDoS is possible with this. Site remains performant as ever.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.4.1"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "nicegui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.22.0"
            },
            {
              "fixed": "3.5.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-21873"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-08T20:16:41Z",
    "nvd_published_at": "2026-01-08T10:15:55Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nAn unsafe implementation in the `pushstate` event listener used by `ui.sub_pages` allows an attacker to manipulate the fragment identifier of the URL, which _they can do despite being cross-site, using an iframe_. \n\n### Details\n\nThe problem is traced as follows:\n\n1. On `pushstate`, `handleStateEvent` is executed. \n\nhttps://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/elements/sub_pages.js#L38-L39\n\n2. `handleStateEvent` emits `sub_pages_open` event. \n\nhttps://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/elements/sub_pages.js#L22-L25 \n\n3. `SubPagesRouter` (used by `ui.sub_pages`), lisnening on `sub_pages_open`, `_handle_open` runs. \n\nhttps://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/sub_pages_router.py#L18-L22\n\n4. `_handle_open` finds any `SubPages` and runs `_show()` on them\n\nhttps://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/sub_pages_router.py#L63-L71\n\n5. If the if-logic is followed or debug prints are added, it can be found that it calls `self._handle_scrolling(match, behavior=\u0027smooth\u0027)` directly\n\nhttps://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/elements/sub_pages.py#L76-L100\n\n6. **CULPRIT** `_handle_scrolling` runs `_scroll_to_fragment` as there is a fragment, which runs vulnerable JS if the `fragment` (attacker-controlled) escapes out of the quotes. \n\nhttps://github.com/zauberzeug/nicegui/blob/59fa9424c470f1b12c5d368985fa36e21fda706b/nicegui/elements/sub_pages.py#L206-L217\n\n### PoC\n\nJust visiting this page (no click required), consistently triggers XSS in https://nicegui.io domain. \n\n```html\n\u003chtml\u003e\n  \u003cbody\u003e\n    \u003ciframe id=\"myiframe\" src=\"https://nicegui.io\" width=\"100%\" height=\"600px\" onload=\"triggerXSS()\"\u003e\u003c/iframe\u003e\n    \u003cscript\u003e\n      function triggerXSS() {\n        if (!myiframe.src.includes(\"#\")) {\n          myiframe.src = \"https://nicegui.io#x\u0027);alert(document.domain)//\";\n        }\n      }\n    \u003c/script\u003e\n  \u003c/body\u003e\n\u003c/html\u003e\n```\n\n\u003cimg width=\"1429\" height=\"643\" alt=\"image\" src=\"https://github.com/user-attachments/assets/310dbb5c-65d5-44f2-8417-dcf044829bc6\" /\u003e\n\n### Impact\n\nAny page which uses `ui.sub_pages` and does not actively prevent itself from being put in an iframe is affected.\n\nThe impact is high since by-default NiceGUI pages are iframe-embeddable with no native opt-out functionalities except by manipulating the underlying `app` via FastAPI methods, and that `ui.sub_pages` is actively promoted as the new modern way to create Single-Page Applications (SPA). \n\n### Patch\n\n1. Not use `ui.sub_pages`\n2. Block iframe with the following code\n\n```py\n@app.middleware(\u0027http\u0027)\nasync def iframe_blocking_middleware(request, call_next):\n    response = await call_next(request)\n    response.headers[\u0027X-Frame-Options\u0027] = \u0027DENY\u0027\n    return response\n```\n\n### Appendix\n\nAI is used safely to judge the CVSS scoring (input is censored).\n\nPlease find the results in https://poe.com/s/3FXuwp7TAYxqLomARXma\n\n### Scoring update after manual review\n\nThe scoring done by AI was quite biased. Upon further review it is less dramatic. \n\n- User Interaction **None**: There\u0027s _almost_ no interaction required, and none of the interaction is with the vulnerable system.\n- Confidentiality \u0026 Integrity **Low**: The extent of data confidentiality \u0026 integrity loss is bounded by the highest priviledged user in the entire NiceGUI application. There does not exist a means of performing data manipulating tasks that said admin cannot already do. \n- Availability **None**: No DDoS is possible with this. Site remains performant as ever.",
  "id": "GHSA-mhpg-c27v-6mxr",
  "modified": "2026-01-08T20:16:41Z",
  "published": "2026-01-08T20:16:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mhpg-c27v-6mxr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21873"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/zauberzeug/nicegui"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "NiceGUI apps which use `ui.sub_pages` vulnerable to zero-click XSS"
}

GHSA-MHPJ-7M7H-8P6X

Vulnerability from github – Published: 2023-05-11 20:29 – Updated: 2023-05-11 20:29
VLAI
Summary
Pimcore Cross-site Scripting (XSS) in Static Routes name field
Details

Impact

This vulnerability has the potential to steal a user's cookie and gain unauthorized access to that user's account through the stolen cookie or redirect users to other malicious sites.

Patches

Update to version 10.5.21 or apply this patch manually: https://github.com/pimcore/pimcore/commit/07a2c95be524c7e20105cef58c5767d4ebb06091.patch

Workarounds

Apply patches manually: https://github.com/pimcore/pimcore/commit/07a2c95be524c7e20105cef58c5767d4ebb06091.patch

References

https://huntr.dev/bounties/564cb512-2bcc-4458-8c20-88110ab45801/

Severity
6.8 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "pimcore/pimcore"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10.5.21"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-2616"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-05-11T20:29:01Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nThis vulnerability has the potential to steal a user\u0027s cookie and gain unauthorized access to that user\u0027s account through the stolen cookie or redirect users to other malicious sites.\n\n\n### Patches\nUpdate to version 10.5.21 or apply this patch manually:\nhttps://github.com/pimcore/pimcore/commit/07a2c95be524c7e20105cef58c5767d4ebb06091.patch\n\n### Workarounds\nApply patches manually:\nhttps://github.com/pimcore/pimcore/commit/07a2c95be524c7e20105cef58c5767d4ebb06091.patch\n\n### References\nhttps://huntr.dev/bounties/564cb512-2bcc-4458-8c20-88110ab45801/\n",
  "id": "GHSA-mhpj-7m7h-8p6x",
  "modified": "2023-05-11T20:29:01Z",
  "published": "2023-05-11T20:29:01Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pimcore/pimcore/security/advisories/GHSA-mhpj-7m7h-8p6x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-2616"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pimcore/pimcore/commit/07a2c95be524c7e20105cef58c5767d4ebb06091"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pimcore/pimcore"
    },
    {
      "type": "WEB",
      "url": "https://huntr.dev/bounties/564cb512-2bcc-4458-8c20-88110ab45801"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Pimcore Cross-site Scripting (XSS) in Static Routes name field"
}
Mitigation MIT-4
Architecture and Design

Strategy: Libraries or Frameworks

  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
  • Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and Apache Wicket.
Mitigation
Implementation Architecture and Design
  • Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages. Study all expected communication protocols and data representations to determine the required encoding strategies.
  • For any data that will be output to another web page, especially any data that was received from external inputs, use the appropriate encoding on all non-alphanumeric characters.
  • Parts of the same output document may require different encodings, which will vary depending on whether the output is in the:
  • etc. Note that HTML Entity Encoding is only appropriate for the HTML body.
  • Consult the XSS Prevention Cheat Sheet [REF-724] for more details on the types of encoding and escaping that are needed.
  • HTML body
  • Element attributes (such as src="XYZ")
  • URIs
  • JavaScript sections
  • Cascading Style Sheets and style property
Mitigation MIT-6
Architecture and Design Implementation

Strategy: Attack Surface Reduction

Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.

Mitigation MIT-15
Architecture and Design

For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.

Mitigation MIT-27
Architecture and Design

Strategy: Parameterization

If available, use structured mechanisms that automatically enforce the separation between data and code. These mechanisms may be able to provide the relevant quoting, encoding, and validation automatically, instead of relying on the developer to provide this capability at every point where output is generated.

Mitigation MIT-30.1
Implementation

Strategy: Output Encoding

  • Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
  • The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
Mitigation MIT-43
Implementation

With Struts, write all data from form beans with the bean's filter attribute set to true.

Mitigation MIT-31
Implementation

Strategy: Attack Surface Reduction

To help mitigate XSS attacks against the user's session cookie, set the session cookie to be HttpOnly. In browsers that support the HttpOnly feature (such as more recent versions of Internet Explorer and Firefox), this attribute can prevent the user's session cookie from being accessible to malicious client-side scripts that use document.cookie. This is not a complete solution, since HttpOnly is not supported by all browsers. More importantly, XmlHttpRequest and other powerful browser technologies provide read access to HTTP headers, including the Set-Cookie header in which the HttpOnly flag is set.

Mitigation MIT-5
Implementation

Strategy: Input Validation

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • When dynamically constructing web pages, use stringent allowlists that limit the character set based on the expected value of the parameter in the request. All input should be validated and cleansed, not just parameters that the user is supposed to specify, but all data in the request, including hidden fields, cookies, headers, the URL itself, and so forth. A common mistake that leads to continuing XSS vulnerabilities is to validate only fields that are expected to be redisplayed by the site. It is common to see data from the request that is reflected by the application server or the application that the development team did not anticipate. Also, a field that is not currently reflected may be used by a future developer. Therefore, validating ALL parts of the HTTP request is recommended.
  • Note that proper output encoding, escaping, and quoting is the most effective solution for preventing XSS, although input validation may provide some defense-in-depth. This is because it effectively limits what will appear in output. Input validation will not always prevent XSS, especially if you are required to support free-form text fields that could contain arbitrary characters. For example, in a chat application, the heart emoticon ("<3") would likely pass the validation step, since it is commonly used. However, it cannot be directly inserted into the web page because it contains the "<" character, which would need to be escaped or otherwise handled. In this case, stripping the "<" might reduce the risk of XSS, but it would produce incorrect behavior because the emoticon would not be recorded. This might seem to be a minor inconvenience, but it would be more important in a mathematical forum that wants to represent inequalities.
  • Even if you make a mistake in your validation (such as forgetting one out of 100 input fields), appropriate encoding is still likely to protect you from injection-based attacks. As long as it is not done in isolation, input validation is still a useful technique, since it may significantly reduce your attack surface, allow you to detect some attacks, and provide other security benefits that proper encoding does not address.
  • Ensure that you perform input validation at well-defined interfaces within the application. This will help protect the application even if a component is reused or moved elsewhere.
Mitigation MIT-21
Architecture and Design

Strategy: Enforcement by Conversion

When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.

Mitigation MIT-29
Operation

Strategy: Firewall

Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].

Mitigation MIT-16
Operation Implementation

Strategy: Environment Hardening

When using PHP, configure the application so that it does not use register_globals. During implementation, develop the application so that it does not rely on this feature, but be wary of implementing a register_globals emulation that is subject to weaknesses such as CWE-95, CWE-621, and similar issues.

CAPEC-209: XSS Using MIME Type Mismatch

An adversary creates a file with scripting content but where the specified MIME type of the file is such that scripting is not expected. The adversary tricks the victim into accessing a URL that responds with the script file. Some browsers will detect that the specified MIME type of the file does not match the actual type of its content and will automatically switch to using an interpreter for the real content type. If the browser does not invoke script filters before doing this, the adversary's script may run on the target unsanitized, possibly revealing the victim's cookies or executing arbitrary script in their browser.

CAPEC-588: DOM-Based XSS

This type of attack is a form of Cross-Site Scripting (XSS) where a malicious script is inserted into the client-side HTML being parsed by a web browser. Content served by a vulnerable web application includes script code used to manipulate the Document Object Model (DOM). This script code either does not properly validate input, or does not perform proper output encoding, thus creating an opportunity for an adversary to inject a malicious script launch a XSS attack. A key distinction between other XSS attacks and DOM-based attacks is that in other XSS attacks, the malicious script runs when the vulnerable web page is initially loaded, while a DOM-based attack executes sometime after the page loads. Another distinction of DOM-based attacks is that in some cases, the malicious script is never sent to the vulnerable web server at all. An attack like this is guaranteed to bypass any server-side filtering attempts to protect users.

CAPEC-591: Reflected XSS

This type of attack is a form of Cross-Site Scripting (XSS) where a malicious script is "reflected" off a vulnerable web application and then executed by a victim's browser. The process starts with an adversary delivering a malicious script to a victim and convincing the victim to send the script to the vulnerable web application.

CAPEC-592: Stored XSS

An adversary utilizes a form of Cross-site Scripting (XSS) where a malicious script is persistently "stored" within the data storage of a vulnerable web application as valid input.

CAPEC-63: Cross-Site Scripting (XSS)

An adversary embeds malicious scripts in content that will be served to web browsers. The goal of the attack is for the target software, the client-side browser, to execute the script with the users' privilege level. An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute code and scripts. Web browsers, for example, have some simple security controls in place, but if a remote attacker is allowed to execute scripts (through injecting them in to user-generated content like bulletin boards) then these controls may be bypassed. Further, these attacks are very difficult for an end user to detect.

CAPEC-85: AJAX Footprinting

This attack utilizes the frequent client-server roundtrips in Ajax conversation to scan a system. While Ajax does not open up new vulnerabilities per se, it does optimize them from an attacker point of view. A common first step for an attacker is to footprint the target environment to understand what attacks will work. Since footprinting relies on enumeration, the conversational pattern of rapid, multiple requests and responses that are typical in Ajax applications enable an attacker to look for many vulnerabilities, well-known ports, network locations and so on. The knowledge gained through Ajax fingerprinting can be used to support other attacks, such as XSS.

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