CVE-2026-20233 (GCVE-0-2026-20233)
Vulnerability from cvelistv5
Published
2026-06-03 16:06
Modified
2026-06-03 17:49
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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.
Impacted products
Vendor Product Version
Cisco Cisco Webex Meetings Version: 39.7.7
Version: 39.9
Version: 40.4.10
Version: 39.6
Version: 40.6.2
Version: 39.8.2
Version: 39.8.4
Version: 40.1
Version: 39.11
Version: 39.7.4
Version: 39.9.1
Version: 40.4
Version: 40.6
Version: 39.7
Version: 39.8
Version: 39.8.3
Version: 40.2
Version: 39.10
Version: 42.6
Version: 42.7
Version: 42.8
Version: 42.9
Version: 42.10
Version: 42.11
Version: 42.12
Version: 43.1
Version: 43.2
Version: 43.3
Version: 43.4
Version: 43.4.1
Version: 43.4.2
Version: 43.5.0
Version: 43.6.0
Version: 43.6.1
Version: 43.7
Version: 43.8
Version: 43.9
Version: 43.10
Version: 43.11
Version: 43.12
Version: 44.1
Version: 44.2
Version: 44.3
Version: 44.4
Version: 44.5
Version: 44.6
Version: 44.7
Version: 44.8
Version: 44.9
Version: 44.10
Version: 44.11
Version: 44.12
Version: 45.1
Version: 45.2
Version: 45.3
Version: 45.4
Create a notification for this product.
Show details on NVD website


{
  "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"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…