What’s Vulnerable › Vulnerabilities

CVE-2025-13013: Mitigation bypass in the DOM: Core & HTML component

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-11-11 · updated 2026-10-23
• Weakness: CWE-288

Description

Mitigation bypass in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Firefox ESR 115.30, Thunderbird 145, and Thunderbird 140.5.

Affected products

• Mozilla Firefox: before 115.30.0; before 145.0; from 140.0 before 140.5.0 — fixed in 115.30.0, 140.5.0, 145.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 115.30.0, 140.5.0, 145.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1991945
• https://www.mozilla.org/security/advisories/mfsa2025-87/
• https://www.mozilla.org/security/advisories/mfsa2025-88/
• https://www.mozilla.org/security/advisories/mfsa2025-89/
• https://www.mozilla.org/security/advisories/mfsa2025-90/
• https://www.mozilla.org/security/advisories/mfsa2025-91/

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