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GHSA-474G-PXQ3-XP9Q

Vulnerability from github – Published: 2026-06-03 18:33 – Updated: 2026-06-03 18:33

Details

This vulnerability existed because of insufficient validation of user input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information.

Severity

6.1 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-20233"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-03T18:16:20Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability in the web-based user interface of Cisco Webex Meetings could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed.\n\nThis vulnerability existed because of insufficient validation of user input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information.",
  "id": "GHSA-474g-pxq3-xp9q",
  "modified": "2026-06-03T18:33:11Z",
  "published": "2026-06-03T18:33:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20233"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-xss-jw3NeQzS"
    }
  ],
  "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"
    }
  ]
}

CVE-2026-20233 (GCVE-0-2026-20233)

Vulnerability from cvelistv5 – Published: 2026-06-03 16:06 – Updated: 2026-06-03 17:49

Title

Cisco Webex Meetings Cross-Site Scripting Vulnerability

Summary

A vulnerability in the web-based user interface of Cisco Webex Meetings could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed. This vulnerability existed because of insufficient validation of user input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information.

Severity

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

cisco

References

1 reference

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco Webex Meetings	Affected: 39.7.7 Affected: 39.9 Affected: 40.4.10 Affected: 39.6 Affected: 40.6.2 Affected: 39.8.2 Affected: 39.8.4 Affected: 40.1 Affected: 39.11 Affected: 39.7.4 Affected: 39.9.1 Affected: 40.4 Affected: 40.6 Affected: 39.7 Affected: 39.8 Affected: 39.8.3 Affected: 40.2 Affected: 39.10 Affected: 42.6 Affected: 42.7 Affected: 42.8 Affected: 42.9 Affected: 42.10 Affected: 42.11 Affected: 42.12 Affected: 43.1 Affected: 43.2 Affected: 43.3 Affected: 43.4 Affected: 43.4.1 Affected: 43.4.2 Affected: 43.5.0 Affected: 43.6.0 Affected: 43.6.1 Affected: 43.7 Affected: 43.8 Affected: 43.9 Affected: 43.10 Affected: 43.11 Affected: 43.12 Affected: 44.1 Affected: 44.2 Affected: 44.3 Affected: 44.4 Affected: 44.5 Affected: 44.6 Affected: 44.7 Affected: 44.8 Affected: 44.9 Affected: 44.10 Affected: 44.11 Affected: 44.12 Affected: 45.1 Affected: 45.2 Affected: 45.3 Affected: 45.4

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20233",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-03T17:46:57.004996Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-03T17:49:49.471Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco Webex Meetings",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "39.7.7"
            },
            {
              "status": "affected",
              "version": "39.9"
            },
            {
              "status": "affected",
              "version": "40.4.10"
            },
            {
              "status": "affected",
              "version": "39.6"
            },
            {
              "status": "affected",
              "version": "40.6.2"
            },
            {
              "status": "affected",
              "version": "39.8.2"
            },
            {
              "status": "affected",
              "version": "39.8.4"
            },
            {
              "status": "affected",
              "version": "40.1"
            },
            {
              "status": "affected",
              "version": "39.11"
            },
            {
              "status": "affected",
              "version": "39.7.4"
            },
            {
              "status": "affected",
              "version": "39.9.1"
            },
            {
              "status": "affected",
              "version": "40.4"
            },
            {
              "status": "affected",
              "version": "40.6"
            },
            {
              "status": "affected",
              "version": "39.7"
            },
            {
              "status": "affected",
              "version": "39.8"
            },
            {
              "status": "affected",
              "version": "39.8.3"
            },
            {
              "status": "affected",
              "version": "40.2"
            },
            {
              "status": "affected",
              "version": "39.10"
            },
            {
              "status": "affected",
              "version": "42.6"
            },
            {
              "status": "affected",
              "version": "42.7"
            },
            {
              "status": "affected",
              "version": "42.8"
            },
            {
              "status": "affected",
              "version": "42.9"
            },
            {
              "status": "affected",
              "version": "42.10"
            },
            {
              "status": "affected",
              "version": "42.11"
            },
            {
              "status": "affected",
              "version": "42.12"
            },
            {
              "status": "affected",
              "version": "43.1"
            },
            {
              "status": "affected",
              "version": "43.2"
            },
            {
              "status": "affected",
              "version": "43.3"
            },
            {
              "status": "affected",
              "version": "43.4"
            },
            {
              "status": "affected",
              "version": "43.4.1"
            },
            {
              "status": "affected",
              "version": "43.4.2"
            },
            {
              "status": "affected",
              "version": "43.5.0"
            },
            {
              "status": "affected",
              "version": "43.6.0"
            },
            {
              "status": "affected",
              "version": "43.6.1"
            },
            {
              "status": "affected",
              "version": "43.7"
            },
            {
              "status": "affected",
              "version": "43.8"
            },
            {
              "status": "affected",
              "version": "43.9"
            },
            {
              "status": "affected",
              "version": "43.10"
            },
            {
              "status": "affected",
              "version": "43.11"
            },
            {
              "status": "affected",
              "version": "43.12"
            },
            {
              "status": "affected",
              "version": "44.1"
            },
            {
              "status": "affected",
              "version": "44.2"
            },
            {
              "status": "affected",
              "version": "44.3"
            },
            {
              "status": "affected",
              "version": "44.4"
            },
            {
              "status": "affected",
              "version": "44.5"
            },
            {
              "status": "affected",
              "version": "44.6"
            },
            {
              "status": "affected",
              "version": "44.7"
            },
            {
              "status": "affected",
              "version": "44.8"
            },
            {
              "status": "affected",
              "version": "44.9"
            },
            {
              "status": "affected",
              "version": "44.10"
            },
            {
              "status": "affected",
              "version": "44.11"
            },
            {
              "status": "affected",
              "version": "44.12"
            },
            {
              "status": "affected",
              "version": "45.1"
            },
            {
              "status": "affected",
              "version": "45.2"
            },
            {
              "status": "affected",
              "version": "45.3"
            },
            {
              "status": "affected",
              "version": "45.4"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the web-based user interface of Cisco Webex Meetings could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed.\r\n\r\nThis vulnerability existed because of insufficient validation of user input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-03T16:06:06.659Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-webex-xss-jw3NeQzS",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-xss-jw3NeQzS"
        }
      ],
      "source": {
        "advisory": "cisco-sa-webex-xss-jw3NeQzS",
        "defects": [
          "CSCwt96631"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Cisco Webex Meetings Cross-Site Scripting Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20233",
    "datePublished": "2026-06-03T16:06:06.659Z",
    "dateReserved": "2025-10-08T11:59:15.399Z",
    "dateUpdated": "2026-06-03T17:49:49.471Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-474G-PXQ3-XP9Q

CVE-2026-20233 (GCVE-0-2026-20233)

Tags

Sightings

Nomenclature