CVE-2023-0430

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-02 · updated 2026-10-24
Weakness: CWE-295

Description

Certificate OCSP revocation status was not checked when verifying S/Mime signatures. Mail signed with a revoked certificate would be displayed as having a valid signature. Thunderbird versions from 68 to 102.7.0 were affected by this bug. This vulnerability affects Thunderbird < 102.7.1.

Affected products

Mozilla Thunderbird: from 68.0 before 102.7.1 — fixed in 102.7.1

How to fix

Upgrade to a fixed version: Mozilla Thunderbird 102.7.1. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1769000
https://www.mozilla.org/security/advisories/mfsa2023-04/
https://bugzilla.mozilla.org/show_bug.cgi?id=1769000
https://www.mozilla.org/security/advisories/mfsa2023-04/
https://bugzilla.mozilla.org/show_bug.cgi?id=1769000

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