CVE-2025-3891
moderate-risk
Published 2025-04-29
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.
Do I need to act?
~
1.3% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (5)
References (14)
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:4597
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2025-3891
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2361633
42
/ 100
moderate-risk
Severity
26/34 · High
Exploitability
4/34 · Minimal
Exposure
12/34 · Low