CVE-2025-3891
Mod_auth_openidc: dos via empty post in mod_auth_openidc with oidcpreservepost enabled
02 Description
Mod_auth_openidc: dos via empty post in mod_auth_openidc with oidcpreservepost enabled
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 1.57% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 74.9% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-29.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2025-04-29 11:56Z1 YR AGO
- Last updated
- 2026-06-29 20:42Z4 MO AGO
- Reserved
- 2025-04-23
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-248Uncaught ExceptionBase
- Data version
- 5.2
- Document digest
- 28c6d350377b24d40cc26d4520733da5398df710151e71a69641102e6c6d33c1
05 Affected products
06 References
- access.redhat.comRHSA-2025:10002https://access.redhat.com/errata/RHSA-2025:10002
- access.redhat.comRHSA-2025:10003https://access.redhat.com/errata/RHSA-2025:10003
- access.redhat.comRHSA-2025:10004https://access.redhat.com/errata/RHSA-2025:10004
- access.redhat.comRHSA-2025:10006https://access.redhat.com/errata/RHSA-2025:10006
- access.redhat.comRHSA-2025:10007https://access.redhat.com/errata/RHSA-2025:10007
- access.redhat.comRHSA-2025:10008https://access.redhat.com/errata/RHSA-2025:10008
- access.redhat.comRHSA-2025:10010https://access.redhat.com/errata/RHSA-2025:10010
- access.redhat.comRHSA-2025:4597https://access.redhat.com/errata/RHSA-2025:4597
- access.redhat.comRHSA-2025:9396https://access.redhat.com/errata/RHSA-2025:9396
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2025-3891
- bugzilla.redhat.comRHBZ#2361633https://bugzilla.redhat.com/show_bug.cgi?id=2361633
- github.comhttps://github.com/OpenIDC/mod_auth_openidc/commit/6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b
- github.comhttps://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-x7cf-8wgv-5j86
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00007.html
07 Fixed in
AlmaLinux 8
- cjose Fixed
A version is affected if any line below covers it.
- Affected before 0.6.1-4.module_el8.10.0+3881+234adf82
- Affected before 0.6.1-4.module_el8.9.0+3631+0ced13d7
- cjose-devel Fixed
A version is affected if any line below covers it.
- Affected before 0.6.1-4.module_el8.10.0+3881+234adf82
- Affected before 0.6.1-4.module_el8.9.0+3631+0ced13d7
- mod_auth_openidc Fixed in 2.4.9.4-8.module_el8.10.0+3988+526f0275
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- mod_auth_openidc Fixed in 2.4.10-1.el9_6.2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- cjose Fixed
A version is affected if any line below covers it.
- Affected before 0.6.1-4.module_el8.10.0+3881+234adf82
- Affected before 0.6.1-4.module_el8.9.0+3631+0ced13d7
- cjose-devel Fixed
A version is affected if any line below covers it.
- Affected before 0.6.1-4.module_el8.10.0+3881+234adf82
- Affected before 0.6.1-4.module_el8.9.0+3631+0ced13d7
- mod_auth_openidc Fixed in 2.4.9.4-8.module_el8.10.0+3988+526f0275
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- mod_auth_openidc Fixed in 2.4.10-1.el9_6.2
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- libapache2-mod-auth-openidc Fixed in 2.4.12.3-2+deb12u4
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libapache2-mod-auth-openidc Fixed in 2.4.14.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libapache2-mod-auth-openidc Fixed in 2.4.14.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- libapache2-mod-auth-openidc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- libapache2-mod-auth-openidc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- libapache2-mod-auth-openidc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- libapache2-mod-auth-openidc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- libapache2-mod-auth-openidc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- libapache2-mod-auth-openidc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- libapache2-mod-auth-openidc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- libapache2-mod-auth-openidc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.