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Description

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.

PUBLISHED Reserved 2025-10-08 | Published 2026-06-03 | Updated 2026-06-03 | Assigner cisco




MEDIUM: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem types

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

Product status

Default status
unknown

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
affected

References

sec.cloudapps.cisco.com/...isory/cisco-sa-webex-xss-jw3NeQzS (cisco-sa-webex-xss-jw3NeQzS)

cve.org (CVE-2026-20233)

nvd.nist.gov (CVE-2026-20233)

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