CVE-2025-4093

medium

Description

Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 128.10 and Thunderbird < 128.10.

References

https://www.mozilla.org/security/advisories/mfsa2025-32/

https://www.mozilla.org/security/advisories/mfsa2025-29/

https://bugzilla.mozilla.org/show_bug.cgi?id=1894100

Details

Source: Mitre, NVD

Published: 2025-04-29

Updated: 2025-05-09

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00027