Vulnerability-Lookup

GHSA-22WQ-Q86M-83FH

Vulnerability from github – Published: 2025-08-12 20:20 – Updated: 2025-08-12 20:20

Summary

svg-sanitizer Bypasses Attribute Sanitization

Details

Problem

The sanitization logic at https://github.com/darylldoyle/svg-sanitizer/blob/0.21.0/src/Sanitizer.php#L454-L481 only searches for lower-case attribute names (e.g. xlink:href instead of xlink:HrEf), which allows to by-pass the isHrefSafeValue check. As a result this allows cross-site scripting or linking to external domains.

Proof-of-concept

provided by azizk

<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100" height="100">
  <a xlink:hReF="javascript:alert(document.domain)">
    <rect width="100" height="50" fill="red"></rect>
    <text x="50" y="30" text-anchor="middle" fill="white">Click me</text>
  </a>
</svg>

Credits

The mentioned findings and proof-of-concept example were reported to the TYPO3 Security Team by the external security researcher azizk <medazizknani@gmail.com>.

Severity

5.1 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "enshrined/svg-sanitize"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.22.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-55166"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-08-12T20:20:58Z",
    "nvd_published_at": "2025-08-12T17:15:39Z",
    "severity": "MODERATE"
  },
  "details": "#### Problem\n\nThe sanitization logic at https://github.com/darylldoyle/svg-sanitizer/blob/0.21.0/src/Sanitizer.php#L454-L481 only searches for lower-case attribute names (e.g. `xlink:href` instead of `xlink:HrEf`), which allows to by-pass the `isHrefSafeValue` check. As a result this allows cross-site scripting or linking to external domains.\n\n#### Proof-of-concept\n_provided by azizk_\n\n```\n\u003c?xml version=\"1.0\" encoding=\"UTF-8\"?\u003e\n\u003csvg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"100\" height=\"100\"\u003e\n  \u003ca xlink:hReF=\"javascript:alert(document.domain)\"\u003e\n    \u003crect width=\"100\" height=\"50\" fill=\"red\"\u003e\u003c/rect\u003e\n    \u003ctext x=\"50\" y=\"30\" text-anchor=\"middle\" fill=\"white\"\u003eClick me\u003c/text\u003e\n  \u003c/a\u003e\n\u003c/svg\u003e\n```\n\n#### Credits\n\nThe mentioned findings and proof-of-concept example were reported to the TYPO3 Security Team by the external security researcher `azizk \u003cmedazizknani@gmail.com\u003e`.",
  "id": "GHSA-22wq-q86m-83fh",
  "modified": "2025-08-12T20:20:59Z",
  "published": "2025-08-12T20:20:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-22wq-q86m-83fh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-55166"
    },
    {
      "type": "WEB",
      "url": "https://github.com/darylldoyle/svg-sanitizer/commit/0afa95ea74be155a7bcd6c6fb60c276c39984500"
    },
    {
      "type": "WEB",
      "url": "https://github.com/darylldoyle/svg-sanitizer/commit/5a0a1eaf0c6b0b540dc945fe30c93cf106b357c1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/darylldoyle/svg-sanitizer"
    },
    {
      "type": "WEB",
      "url": "https://github.com/darylldoyle/svg-sanitizer/blob/0.21.0/src/Sanitizer.php#L454-L481"
    },
    {
      "type": "WEB",
      "url": "https://github.com/darylldoyle/svg-sanitizer/releases/tag/0.22.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "svg-sanitizer Bypasses Attribute Sanitization"
}

CVE-2025-55166 (GCVE-0-2025-55166)

Vulnerability from cvelistv5 – Published: 2025-08-12 16:25 – Updated: 2025-08-12 17:48

Title

svg-sanitizer By-Passing Attribute Sanitization

Summary

savg-sanitizer is a PHP SVG/XML sanitizer. Prior to version 0.22.0, the sanitization logic in the cleanXlinkHrefs method only searches for lower-case attribute name, which allows to by-pass the isHrefSafeValue check. As a result this allows cross-site scripting or linking to external domains. This issue has been patched in version 0.22.0.

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-12 17:47 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/darylldoyle/svg-sanitizer/secu…	x_refsource_CONFIRM
https://github.com/darylldoyle/svg-sanitizer/comm…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
darylldoyle	svg-sanitizer	Affected: < 0.22.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-55166",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-12T17:47:50.627813Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-12T17:48:05.000Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "svg-sanitizer",
          "vendor": "darylldoyle",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.22.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "savg-sanitizer is a PHP SVG/XML sanitizer. Prior to version 0.22.0, the sanitization logic in the cleanXlinkHrefs method only searches for lower-case attribute name, which allows to by-pass the isHrefSafeValue check. As a result this allows cross-site scripting or linking to external domains. This issue has been patched in version 0.22.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-601",
              "description": "CWE-601: URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-12T16:25:17.220Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-22wq-q86m-83fh",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-22wq-q86m-83fh"
        },
        {
          "name": "https://github.com/darylldoyle/svg-sanitizer/commit/5a0a1eaf0c6b0b540dc945fe30c93cf106b357c1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/darylldoyle/svg-sanitizer/commit/5a0a1eaf0c6b0b540dc945fe30c93cf106b357c1"
        }
      ],
      "source": {
        "advisory": "GHSA-22wq-q86m-83fh",
        "discovery": "UNKNOWN"
      },
      "title": "svg-sanitizer By-Passing Attribute Sanitization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-55166",
    "datePublished": "2025-08-12T16:25:17.220Z",
    "dateReserved": "2025-08-07T18:27:23.307Z",
    "dateUpdated": "2025-08-12T17:48:05.000Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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