Firefox WebRTC Audio/Video UAF CVE-2025-13020 (<=145, ESR<140.5)
CVE-2025-13020 Published on November 11, 2025
Use-after-free in the WebRTC: Audio/Video component
Use-after-free in the WebRTC: Audio/Video component. This vulnerability affects Firefox < 145, Firefox ESR < 140.5, Thunderbird < 145, and Thunderbird < 140.5.
Vulnerability Analysis
CVE-2025-13020 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2025-13020 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2025-13020
Want to know whenever a new CVE is published for Mozilla products? stack.watch will email you.
Affected Versions
Mozilla Firefox:- Version unspecified and below 145 is affected.
- Version unspecified and below 140.5 is affected.
- Version unspecified and below 145 is affected.
- Version unspecified and below 140.5 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.