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Vulnerability record · CVE-2022-42931 · published 22 December 2022

CVE-2022-42931: Mozilla firefox cleartext storage of sensitive data vulnerability

Mozilla · Firefox

Logins saved by Firefox should be managed by the Password Manager component which uses encryption to save files on-disk. Instead, the username (not password) was saved by the Form Manager to an unencrypted file on disk. This vulnerability affects Firefox < 106.

3.3 CVSS 3.1 Low EPSS 0.14% · top 97.5% CWE-312 · Cleartext storage of sensitive data
3.3CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

Description

Logins saved by Firefox should be managed by the Password Manager component which uses encryption to save files on-disk. Instead, the username (not password) was saved by the Form Manager to an unencrypted file on disk. This vulnerability affects Firefox < 106.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.mozilla.org/show_bug.cgi?id=1780571 Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2022-44/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1780571 Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2022-44/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1780571 Issue Tracking

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-42931), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.