CVE-2025-3891
libapache2-mod-auth-openidc - security update
7.5
HIGH
CVSS 3.1
EPSS 0.67%
Description
A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability.
How to fix CVE-2025-3891
To remediate CVE-2025-3891, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 2.4.9.4-0+deb11u6 or later
- —upgrade to 2.4.9.4-0+deb11u6 or later
- —upgrade to 2.4.12.3-2+deb12u4 or later
Is CVE-2025-3891 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 2.4.9.4-0+deb11u6
- from 0, < 2.4.9.4-0+deb11u6
- from 0, < 2.4.12.3-2+deb12u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |