VulnerabilityModified
CVE-2025-3891
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.
HIGH 7.5EPSS 1.42%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.42%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.42% probability · 71th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-248
- Affected
- apache/http server · redhat/enterprise linux · debian/debian linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2025:10002
- https://access.redhat.com/errata/RHSA-2025:10003
- https://access.redhat.com/errata/RHSA-2025:10004
- https://access.redhat.com/errata/RHSA-2025:10006
- https://access.redhat.com/errata/RHSA-2025:10007
- https://access.redhat.com/errata/RHSA-2025:10008
- https://access.redhat.com/errata/RHSA-2025:10010
- https://access.redhat.com/errata/RHSA-2025:4597Third Party Advisory
- https://access.redhat.com/errata/RHSA-2025:9396
- https://access.redhat.com/security/cve/CVE-2025-3891Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2361633Issue Tracking
- https://github.com/OpenIDC/mod_auth_openidc/commit/6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b
- https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-x7cf-8wgv-5j86
- https://lists.debian.org/debian-lts-announce/2025/05/msg00007.htmlMailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.