CVE-2025-3891

high Apache
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
1.2%
Exploitation probability in 30 days
Top 35% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: April 29, 2025 (437 days ago)
Last Modified: June 29, 2026
Vendor: Apache
Source: NVD

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.

CWE

CWE-248

Affected Products

apache http serverredhat enterprise linuxdebian debian linux

References

🔗 access.redhat.com 🔗 access.redhat.com 🔗 access.redhat.com 🔗 access.redhat.com 🔗 access.redhat.com