CVE-2025-20255 Other in Cisco Webex Meetings

Medium 4.3 Published 21 May 2025 Updated 21 May 2025

An unauthenticated remote attacker can poison HTTP caches in Cisco Webex Meetings, causing clients to receive incorrect responses.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-20255?

CVE-2025-20255 is a medium-severity vulnerability in Cisco Webex Meetings, published on 21 May 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A vulnerability in client join services of Cisco Webex Meetings could allow an unauthenticated, remote attacker to manipulate cached HTTP responses within the meeting join service. This vulnerability is due to improper handling of malicious HTTP requests to the affected service. An attacker could exploit this vulnerability by manipulating stored HTTP responses within the service, also known as HTTP cache poisoning. A successful exploit could allow the attacker to cause the Webex Meetings service to return incorrect HTTP responses to clients.

Weakness: CWE-349

Which versions are affected by CVE-2025-20255?

It affects 1 product.

Products include Cisco Webex Meetings.

How do I fix CVE-2025-20255?

No fix has been published for CVE-2025-20255 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-20255 being exploited?

There is no known exploitation of CVE-2025-20255 in the wild and no public exploit code.

All Cisco Webex Meetings vulnerabilities

Sources

Also known as GHSA-jrwq-36rx-842c.