CVE-2023-0430

Name: CVE-2023-0430
Creator: NVD / NIST
Published: 2023-06-02T17:15:10.28+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2023-0430 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS Probability

0.37%

29.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Thunderbird	>= 68.0, < 102.7.1

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1769000Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-04/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1769000Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-04/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1769000Issue Tracking, Vendor Advisory

Timeline

Published: Jun 2, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-0430?

How severe is CVE-2023-0430?

CVE-2023-0430 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2023-0430?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-0430?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST