CVE-2025-13018 — Authentication Bypass Using an Alternate Path or Channel in Mozilla Firefox

CWE-288 — Authentication Bypass Using an Alternate Path or ChannelCWE-79 — Cross-site Scripting11 documents8 sources
Severity
8.1HIGHNVD
EPSS
0.0%
top 93.05%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedNov 11
Latest updateFeb 2

Description

Mitigation bypass in the DOM: Security 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:NExploitability: 2.8 | Impact: 5.2

Affected Packages2 packages

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

🔴Vulnerability Details

3
GHSA
GHSA-v7r3-hxvj-7w2p: Mitigation bypass in the DOM: Security component↗2025-11-11
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CVEList
Mitigation bypass in the DOM: Security component↗2025-11-11
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OSV
CVE-2025-13018: Mitigation bypass in the DOM: Security component↗2025-11-11
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📋Vendor Advisories

7
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
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Red Hat
firefox: thunderbird: Mitigation bypass in the DOM: Security component↗2025-11-11
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Debian
CVE-2025-13018: firefox - Mitigation bypass in the DOM: Security component. This vulnerability affects Fir...↗2025
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Mozilla
Mozilla Foundation Security Advisory 2025-90: CVE-2025-13018↗
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Mozilla
Mozilla Foundation Security Advisory 2025-88: CVE-2025-13018↗
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CVE-2025-13018 — Mozilla Firefox vulnerability | cvebase