CVE-2025-1010 — Use After Free in Mozilla Firefox

CWE-416 — Use After Free16 documents9 sources
Severity
8.8HIGHNVD
OSV9.8
EPSS
0.3%
top 42.96%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedFeb 4
Latest updateNov 14

Description

An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

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 Packages4 packages

▶NVDmozilla/firefox128.1.0 — 128.7.0+2
▶Ubuntumozilla/firefox< 135.0+build2-0ubuntu0.20.04.1
▶NVDmozilla/thunderbird128.0.1 — 128.7.0+1
▶Debianmozilla/thunderbird< 1:128.7.0esr-1~deb11u1+3

🔴Vulnerability Details

4
OSV
firefox vulnerabilities↗2025-02-11
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OSV
CVE-2025-1010: An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash↗2025-02-04
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GHSA
GHSA-f666-246m-p7mg: An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash↗2025-02-04
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CVEList
Use-after-free in Custom Highlight↗2025-02-04
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📋Vendor Advisories

9
Ubuntu
Thunderbird vulnerabilities↗2025-07-22
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Ubuntu
Firefox vulnerabilities↗2025-02-11
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Red Hat
firefox: thunderbird: Use-after-free in Custom Highlight↗2025-02-04
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Debian
CVE-2025-1010: firefox - An attacker could have caused a use-after-free via the Custom Highlight API, lea...↗2025
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Mozilla
Mozilla Foundation Security Advisory 2025-07: CVE-2025-1010↗
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🕵️Threat Intelligence

1
Bleepingcomputer
ASUS warns of critical auth bypass flaw in DSL series routers↗2025-11-14
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CVE-2025-1010 — Use After Free in Mozilla Firefox | cvebase