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TI-2020-15920 Aliases CVE-2020-26067GHSA-xhwg-j3rh-2ffw

Cisco Webex Teams Web Interface Cross-Site Scripting Vulnerability

Priority LOW 26CWE-80Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-80.

Summary

A vulnerability in the web-based interface of Cisco Webex Teams could allow an authenticated, remote attacker to conduct cross-site scripting attacks. The vulnerability is due to improper validation of usernames. An attacker could exploit this vulnerability by creating an account that contains malicious HTML or script content and joining a space using the malicious account name. A successful exploit could allow the attacker to conduct cross-site scripting attacks and potentially gain access to sensitive browser-based information.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00829 57th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Webex TeamsN/A—No fix listedCNA
  • Cisco Webex Teams VendorCisco Affected N/A Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:webex_teams:*:*:*:*:*:*:*:*all versionsVulnerableCisco
  • cpe:2.3:a:cisco:webex_teams:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-26067
  2. 2026-10-03 Alias added: GHSA-xhwg-j3rh-2ffw

References

Advisory 1

  • TI-2019-01262 Cisco Webex Teams URI Handler Insecure Library Loading Vulnerability CVSS 3.0HIGH 7.8
  • TI-2019-01559 Cisco Webex Teams Logging Feature Command Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2018-00346 Improper input validation in Cisco Webex Teams unknown CVSS 3.1HIGH 8.8
  • TI-2025-14536 Cisco Webex App Client-Side Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2018-00395 Cisco Webex Teams Information Disclosure and Modification Vulnerability CVSS 3.1HIGH 8.7
  • TI-2020-03080 Cisco Webex Teams Client for Windows DLL Hijacking Vulnerability CVSS 3.1HIGH 8.4
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences