CVE-2025-0243CWE-787

CVE-2025-0243

Medium · published January 7, 2025

CVSS v3.1

5.1

EPSS

Percentile

15.4

In the wild

Unconfirmed

What it is

Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

The record

Technical detail

CVSS v3.1: 5.1 · MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0: Not supplied
EPSS: 0.00250 · 15.4th percentile
Weakness: CWE-787 · Out-of-bounds Write
Published: 2025-01-07T21:15Z

Affected products (4)

Product	Versions	Fixed in
mozilla/firefox	< 128.6.0	128.6.0
mozilla/firefox	< 133.0	133.0
mozilla/thunderbird	< 128.6.0	128.6.0
mozilla/thunderbird	≥ 129.0, < 134.0	134.0

References (6)

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1827142%2C1932783 · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-01/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-02/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-04/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-05/ · [email protected]https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html · af854a3a-2127-422b-91ae-364da2661108

EPSS history

Timeline

07 JAN 16:07Z
Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6
cvelistv5