CVE-2022-1520

4.3 mediumEPSS 0.3%

Medium (4.3) in mozilla thunderbird. EPSS 0.3% chance of exploitation in the next 30 days.

When viewing an email message A, which contains an attached message B, where B is encrypted or digitally signed or both, Thunderbird may show an incorrect encryption or signature status. After opening and viewing the attached message B, when returning to the display of message A, the message A might be shown with the security status of message B. This vulnerability affects Thunderbird < 91.9.

Severity

CVSS 3.1

4.3 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-31)
CWE: CWE-346
Published: 2022-12-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:thunderbird

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1745019
https://www.mozilla.org/security/advisories/mfsa2022-18/
https://bugzilla.mozilla.org/show_bug.cgi?id=1745019
https://www.mozilla.org/security/advisories/mfsa2022-18/

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