What is CVE-2022-1520?

CVE-2022-1520 is a medium-severity vulnerability in Mozilla Thunderbird, classified under Origin Validation Error. CVSS score: 4.3/10. Published 2022-12-22.

How severe is CVE-2022-1520?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Mozilla Thunderbird

CVE-2022-1520

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.

EPSS: 0.003 (18.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Mozilla Thunderbird — versions unspecified

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

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

Frequently asked questions

What is CVE-2022-1520?: CVE-2022-1520 is a medium-severity vulnerability in Mozilla Thunderbird, classified under Origin Validation Error. CVSS score: 4.3/10. Published 2022-12-22.
How severe is CVE-2022-1520?: Medium severity. CVSS v3 base score is 4.3 out of 10.