CVE-2025-13020 — Use After Free in Mozilla Firefox

CWE-416 — Use After FreeCWE-825 — Expired Pointer Dereference11 documents8 sources
Severity
8.8HIGHNVD
EPSS
0.0%
top 89.26%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedNov 11
Latest updateFeb 2

Description

Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages2 packages

▶NVDmozilla/firefox< 140.5.0+1
▶Debianmozilla/thunderbird< 1:140.5.0esr-1~deb11u1+3

🔴Vulnerability Details

3
CVEList
Use-after-free in the WebRTC: Audio/Video component↗2025-11-11
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GHSA
GHSA-2q3p-f6j6-9qhj: Use-after-free in the WebRTC: Audio/Video component↗2025-11-11
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OSV
CVE-2025-13020: Use-after-free in the WebRTC: Audio/Video component↗2025-11-11
▶

📋Vendor Advisories

7
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
▶
Red Hat
firefox: thunderbird: Use-after-free in the WebRTC: Audio/Video component↗2025-11-11
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Debian
CVE-2025-13020: firefox - Use-after-free in the WebRTC: Audio/Video component. This vulnerability affects ...↗2025
▶
Mozilla
Mozilla Foundation Security Advisory 2025-90: CVE-2025-13020↗
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Mozilla
Mozilla Foundation Security Advisory 2025-87: CVE-2025-13020↗
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CVE-2025-13020 — Use After Free in Mozilla Firefox | cvebase