CVE-2023-0547

Name: CVE-2023-0547
Creator: NVD / NIST
Published: 2023-06-02T17:15:10.337+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2023-0547 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. OCSP revocation status of recipient certificates was not checked when sending S/Mime encrypted email, and revoked certificates would be accepted. Thunderbird versions from 68 to 102.9.1 were affected by this bug. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

OCSP revocation status of recipient certificates was not checked when sending S/Mime encrypted email, and revoked certificates would be accepted. Thunderbird versions from 68 to 102.9.1 were affected by this bug. This vulnerability affects Thunderbird < 102.10.

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, < 102.10

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1811298Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-15/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1811298Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-15/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2023-0547?

How severe is CVE-2023-0547?

CVE-2023-0547 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-2023-0547?

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-2023-0547?

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

Scan your code now

Source: NVD / NIST