CVE-2025-55299

9.4 criticalEPSS 0.2%

Critical (9.4). EPSS 0.2% chance of exploitation in the next 30 days.

VaulTLS is a modern solution for managing mTLS (mutual TLS) certificates. Prior to 0.9.1, user accounts created through the User web UI have an empty but not NULL password set, attackers can use this to login with an empty password. This is combined with that fact, that previously disabling the password based login only effected the frontend, but still allowed login via the API. This vulnerability is fixed in 0.9.1.

Severity

CVSS 3.1

9.4 critical

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-31)
CWE: CWE-521
Published: 2025-08-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://github.com/7ritn/VaulTLS/commit/6ac0a43a768f1753f6889ba43f914e773a4b45c0
https://github.com/7ritn/VaulTLS/security/advisories/GHSA-pjfr-pj3h-cw8m

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