Cisco Webex Meetings URL Redirection Vulnerability

🚨 SEVERITY: MEDIUM — CVSS 4.3 Security Advisory

TL;DR 📌

A medium-severity vulnerability in Cisco Webex Meetings could allow an unauthenticated attacker to redirect users to untrusted websites. Cisco has addressed this issue, and no action is required from users.

What happened 🕵️‍♂️

A vulnerability in Cisco Webex Meetings was discovered, which could allow an unauthenticated, remote attacker to redirect a targeted user to an untrusted website. This issue arose due to insufficient validation of URLs included in meeting-join links. If exploited, this could facilitate phishing attacks by misleading users into believing they were interacting with a trusted Webex environment.

Affected products 🖥️

  • Cisco Webex Meetings (cloud-based)

Fixed software 🔧

Upgrade to the first fixed release in your train (or later):

Release / Product First Fixed Release Notes
1.0 Initial public release.
Cisco Webex Meetings Not specified

Workarounds 🧯

There are no workarounds that address this vulnerability.

Risk in context 🎯

The vulnerability has a CVSS score of 4.3, indicating a medium risk. While it does not require authentication and could potentially lead to phishing attempts, the lack of known exploitation or public announcements about this vulnerability mitigates immediate concerns.

Fast facts ⚡

  • CVE Identifier: CVE-2025-20291
  • CVSS Score: 4.3 (Medium)
  • No user action required for remediation
  • No workarounds available

For leadership 🧭

The vulnerability in Cisco Webex Meetings poses a Medium risk, primarily due to its potential for phishing attacks. It is internet-facing and does not require authentication, which increases exposure. However, there are no known exploits or public incidents associated with this issue.

Remediation ask: No immediate action is required, as Cisco has already addressed the vulnerability.

Operational impact: Minimal; no configuration changes are expected.

Now / Next / Later:

  • Now: No action needed; vulnerability has been fixed.
  • Next: Monitor for any updates or further advisories from Cisco.
  • Later: Review security practices related to user interactions in Webex Meetings to mitigate phishing risks.