CVE-2021-1420

A vulnerability in certain web pages of Cisco Webex Meetings could allow an unauthenticated, remote attacker to modify a web page in the context of a user's browser. The vulnerability is due to improper checks on parameter values in affected pages. An attacker could exploit this vulnerability by persuading a user to follow a crafted link that is designed to pass HTML code into an affected parameter. A successful exploit could allow the attacker to alter the contents of a web page to redirect the user to potentially malicious websites, or the attacker could use this vulnerability to conduct further client-side attacks.

• CWE-80

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-VObwRKWVVendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-VObwRKWVVendor Advisory

Published

Apr 8, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-1414Multiple vulnerabilities in the web-based management interfa…6.3
• CVE-2021-1415Multiple vulnerabilities in the web-based management interfa…6.3
• CVE-2021-1416Multiple vulnerabilities in the Admin portal of Cisco Identi…4.3
• CVE-2021-1417Multiple vulnerabilities in Cisco Jabber for Windows, Cisco …6.5
• CVE-2021-1418Multiple vulnerabilities in Cisco Jabber for Windows, Cisco …6.5
• CVE-2021-1419A vulnerability in the SSH management feature of multiple Ci…7.8
• CVE-2021-1421A vulnerability in Cisco Enterprise NFV Infrastructure Softw…7.8
• CVE-2021-1422A vulnerability in the software cryptography module of Cisco…7.7
• CVE-2021-1423A vulnerability in the implementation of a CLI command in Ci…4.4
• CVE-2021-1424A vulnerability in the ipsecmgr process of Cisco ASR 50…5.3
• CVE-2021-1425A vulnerability in the web-based management interface of Cis…6.5
• CVE-2021-1426Multiple vulnerabilities in the install, uninstall, and upgr…7.8