CVE-2025-3891

Mod_auth_openidc: dos via empty post in mod_auth_openidc with oidcpreservepost enabled

HIGH 7.5

At a glance

Source: NVD
EPSS: EPSS 1.58 % · percentile 75 (2026-10-28)
State: PUBLISHED
Published: 2025-04-29 11:56 UTC
Updated: 2026-06-29 20:42 UTC
Assigner: redhat
NVD status: Modified

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.

Weaknesses (CWE)

CWE-248 — Uncaught Exception

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · secalert@redhat.com (Secondary)
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · nvd@nist.gov (Secondary)

European references

ENISA EUVD · EUVD-2025-13653
GCVE · GCVE-0-2025-3891

Affected configurations (NVD CPE)

cpe:2.3:a:apache:http_server:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

Affected products

Product	Versions
mod_auth_openidc	affected 2.0.0 < 2.4.13.1
Red Hat · Red Hat Enterprise Linux 8	unaffected 8100020250426100353.489197e6 < *
Red Hat · Red Hat Enterprise Linux 8.2 Advanced Update Support	unaffected 8020020250612174445.4cda2c84 < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected 8040020250618101351.522a0ee4 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 8060020250617090503.ad008a3a < *
Red Hat · Red Hat Enterprise Linux 8.6 Telecommunications Update Service	unaffected 8060020250617090503.ad008a3a < *
Red Hat · Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions	unaffected 8060020250617090503.ad008a3a < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service	unaffected 8080020250617090716.63b34585 < *
Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	unaffected 8080020250617090716.63b34585 < *
Red Hat · Red Hat Enterprise Linux 9	unaffected 0:2.4.10-1.el9_6.2 < *
Red Hat · Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions	unaffected 0:2.4.9.4-1.el9_0.3 < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	unaffected 0:2.4.9.4-1.el9_2.3 < *
Red Hat · Red Hat Enterprise Linux 9.4 Extended Update Support	unaffected 0:2.4.9.4-4.el9_4.2 < *
Red Hat · Red Hat Enterprise Linux 10
Red Hat · Red Hat Enterprise Linux 7

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD