CVE-2023-25746

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-02 · updated 2026-10-23
Weakness: CWE-787

Description

Memory safety bugs present in Firefox ESR 102.7. 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 affects Thunderbird < 102.8 and Firefox ESR < 102.8.

Affected products

Mozilla Firefox ESR: before 102.8 — fixed in 102.8
Mozilla Thunderbird: before 102.8 — fixed in 102.8

How to fix

Upgrade to a fixed version: Mozilla Firefox ESR 102.8; Mozilla Thunderbird 102.8. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1544127%2C1762368
https://www.mozilla.org/security/advisories/mfsa2023-06/
https://www.mozilla.org/security/advisories/mfsa2023-07/
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1544127%2C1762368
https://www.mozilla.org/security/advisories/mfsa2023-06/
https://www.mozilla.org/security/advisories/mfsa2023-07/

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