What is CVE-2023-0547?

CVE-2023-0547 is a medium-severity vulnerability in Mozilla Thunderbird, classified under Improper Certificate Validation. CVSS score: 6.5/10. Published 2023-06-02.

How severe is CVE-2023-0547?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Mozilla Thunderbird

CVE-2023-0547

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.

Vulnerability class: Improper Certificate Validation

EPSS: 0.004 (29.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Mozilla Thunderbird — versions unspecified

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

security@mozilla.org (Vendor Advisory)
security@mozilla.org (Permissions Required, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2023-0547?: CVE-2023-0547 is a medium-severity vulnerability in Mozilla Thunderbird, classified under Improper Certificate Validation. CVSS score: 6.5/10. Published 2023-06-02.
How severe is CVE-2023-0547?: Medium severity. CVSS v3 base score is 6.5 out of 10.