CVE record · CVE-2025-3891

Mod_auth_openidc: dos via empty post in mod_auth_openidc with oidcpreservepost enabled

CVSS 7.5 HighEPSS 0.016 · 75th percentile

Published by the CVE Program (CNA: redhat) at 29 Apr 2025, 11:56 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	Not given Package name: mod_auth_openidc https://github.com/OpenIDC/mod_auth_openidc	affected 2.0.0 to before 2.4.13.1 semver Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 8 Package name: mod_auth_openidc:2.3 https://access.redhat.com/downloads/content/package-browser/	unaffected 8100020250426100353.489197e6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support Package name: mod_auth_openidc:2.3 https://access.redhat.com/downloads/content/package-browser/	unaffected 8020020250612174445.4cda2c84 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: mod_auth_openidc:2.3 https://access.redhat.com/downloads/content/package-browser/	unaffected 8040020250618101351.522a0ee4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: mod_auth_openidc:2.3 https://access.redhat.com/downloads/content/package-browser/	unaffected 8060020250617090503.ad008a3a to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service Package name: mod_auth_openidc:2.3 https://access.redhat.com/downloads/content/package-browser/	unaffected 8060020250617090503.ad008a3a to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Package name: mod_auth_openidc:2.3 https://access.redhat.com/downloads/content/package-browser/	unaffected 8060020250617090503.ad008a3a to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: mod_auth_openidc:2.3 https://access.redhat.com/downloads/content/package-browser/	unaffected 8080020250617090716.63b34585 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: mod_auth_openidc:2.3 https://access.redhat.com/downloads/content/package-browser/	unaffected 8080020250617090716.63b34585 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: mod_auth_openidc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.4.10-1.el9_6.2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Package name: mod_auth_openidc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.4.9.4-1.el9_0.3 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: mod_auth_openidc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.4.9.4-1.el9_2.3 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support Package name: mod_auth_openidc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.4.9.4-4.el9_4.2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10 Package name: mod_auth_openidc https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Package name: mod_auth_openidc https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unaffected

Identifiers: CVE-2025-3891
CNA: redhat
Weakness (CWE): CWE-248
Tags: Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.2 Advanced Update Support
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.6 Telecommunications Update Service
Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
CWE-248
Published: 29 Apr 2025
Updated: 4 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (redhat)

CISA KEV Not listed.
EPSS 0.016, the 75th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

29 Apr 2025, 11:56 UTC Confirmed by the CVE List
29 Apr 2025, 12:15 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2025:10002 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:10003 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:10004 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:10006 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:10007 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:10008 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:10010 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:4597 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2025:9396 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2025-3891 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2361633 issue-trackingredhat
github.com/OpenIDC/mod_auth_openidc/commit/6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b
github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-x7cf-8wgv-5j86

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.