CVE-2025-20291: cisco cisco webex meetings Open Redirect

Vulnerability summary

CVE-2025-20291 is a medium (CVSS 6.1) Open Redirect vulnerability in cisco cisco webex meetings. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 13.4% of scored vulnerabilities.

Timeline

1. 03-09-2025
   PublishedVulnerability first disclosed.
2. 03-09-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability in Cisco Webex Meetings could have allowed an unauthenticated, remote attacker to redirect a targeted Webex Meetings user to an untrusted website. Cisco has addressed this vulnerability in the Cisco Webex Meetings service, and no customer action is needed. This vulnerability existed because of insufficient validation of URLs that were included in a meeting-join URL. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by including a URL to a website of their choosing in a specific value of a Cisco Webex Meetings join URL. A successful exploit could have allowed the attacker to redirect a targeted user to a website that was controlled by the attacker, possibly making the user more likely to believe the website was trusted by Webex and perform additional actions as part of phishing attacks.

• CWE-601URL Redirection to Untrusted Site ('Open Redirect')The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.