What’s Vulnerable › Vulnerabilities

CVE-2023-0547

• 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 2026-10-23
• Weakness: CWE-295

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.

Affected products

• Mozilla Thunderbird: from 68.0 before 102.10 — fixed in 102.10

How to fix

Upgrade to a fixed version: Mozilla Thunderbird 102.10. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1811298
• https://www.mozilla.org/security/advisories/mfsa2023-15/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1811298
• https://www.mozilla.org/security/advisories/mfsa2023-15/

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