CVE-2025-3891
Mod_auth_openidc: dos via empty post in mod_auth_openidc with oidcpreservepost enabled
Severity Score
5.3
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Attend
*SSVC
Descriptions
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.
A vulnerability has been discovered in mod_auth_openidc, an OpenID Certified authentication and authorization module for the Apache HTTP server that implements the OpenID Connect Relying Party functionality.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Attend
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2025-04-23 CVE Reserved
- 2025-04-29 CVE Published
- 2025-05-12 CVE Updated
- 2025-05-13 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-248: Uncaught Exception
CAPEC
References (3)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2025-3891 | 2025-04-29 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2361633 | 2025-04-29 | |
| https://access.redhat.com/errata/RHSA-2025:4597 | 2025-05-12 |
Affected Vendors, Products, and Versions
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| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Oracle Search vendor "Oracle" | Linux Search vendor "Oracle" for product "Linux" | * | - |
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| Red Hat Search vendor "Red Hat" | Enterprise Linux Search vendor "Red Hat" for product "Enterprise Linux" | * | - |
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | * | - |
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| Alma Search vendor "Alma" | Linux Search vendor "Alma" for product "Linux" | * | - |
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | * | - |
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| Oracle Search vendor "Oracle" | Linux Search vendor "Oracle" for product "Linux" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Eus Search vendor "Redhat" for product "Rhel Eus" | * | - |
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