8.2

CVE-2025-31492: openidc mod_auth_openidc

CVSS: 8.2v4.0HighDeferred
AliasesMGASA-2025-0147SUSE-SU-2025:1286-1SUSE-SU-2025:1324-1
Published 06-04-2025Last modified 17-04-2025
Open JSON

Vulnerability summary

CVE-2025-31492 is a high (CVSS 8.2) vulnerability in openidc mod_auth_openidc. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 46.6% of scored vulnerabilities.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.2/10
010
High · v4.0 (CVE.org)
EPSS score
0.58%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
SUSE-SU-2025:4532-1

Timeline

  1. 06-04-2025
    PublishedVulnerability first disclosed.
  2. 17-04-2025
    Last modifiedVulnerability information updated.

Description

mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.16.11, a bug in a mod_auth_openidc results in disclosure of protected content to unauthenticated users. The conditions for disclosure are an OIDCProviderAuthRequestMethod POST, a valid account, and there mustn't be any application-level gateway (or load balancer etc) protecting the server. When you request a protected resource, the response includes the HTTP status, the HTTP headers, the intended response (the self-submitting form), and the protected resource (with no headers). This is an example of a request for a protected resource, including all the data returned. In the case where mod_auth_openidc returns a form, it has to return OK from check_userid so as not to go down the error path in httpd. This means httpd will try to issue the protected resource. oidc_content_handler is called early, which has the opportunity to prevent the normal output being issued by httpd. oidc_content_handler has a number of checks for when it intervenes, but it doesn't check for this case, so the handler returns DECLINED. Consequently, httpd appends the protected content to the response. The issue has been patched in mod_auth_openidc versions >= 2.4.16.11.

CVSS metrics

5 scores · 5 sources · 2 versions

EPSS trend

Probability

0.58%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

+0.01 pp

From 0.57% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.58%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse17 products
  • apache2-mod_auth_openidc&distro=SUSE Enterprise Storage 7.1< 2.3.8-150100.3.31.1
  • apache2-mod_auth_openidc&distro=SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS< 2.3.8-150100.3.31.1
  • apache2-mod_auth_openidc&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS< 2.3.8-150100.3.31.1
  • apache2-mod_auth_openidc&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS< 2.3.8-150100.3.31.1
  • apache2-mod_auth_openidc&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS< 2.3.8-150100.3.31.1
Redhat7 products
  • cjose< 0:0.6.1-4.module+el8.10.0+21813+b5444eb8 | < 0:0.6.1-3.module+el8.8.0+19464+578f4546 | < 0:0.6.1-3.module+el8.6.0+19463+7d2e1f9c | < 0:0.6.1-3.module+el8.4.0+19462+14bde120 | < 0:0.6.1-3.module+el8.2.0+19461+3a40b6ee
  • cjose-debuginfo< 0:0.6.1-4.module+el8.10.0+21813+b5444eb8 | < 0:0.6.1-3.module+el8.8.0+19464+578f4546 | < 0:0.6.1-3.module+el8.6.0+19463+7d2e1f9c | < 0:0.6.1-3.module+el8.4.0+19462+14bde120 | < 0:0.6.1-3.module+el8.2.0+19461+3a40b6ee
  • cjose-debugsource< 0:0.6.1-4.module+el8.10.0+21813+b5444eb8 | < 0:0.6.1-3.module+el8.8.0+19464+578f4546 | < 0:0.6.1-3.module+el8.6.0+19463+7d2e1f9c | < 0:0.6.1-3.module+el8.4.0+19462+14bde120 | < 0:0.6.1-3.module+el8.2.0+19461+3a40b6ee
  • cjose-devel< 0:0.6.1-4.module+el8.10.0+21813+b5444eb8 | < 0:0.6.1-3.module+el8.8.0+19464+578f4546 | < 0:0.6.1-3.module+el8.6.0+19463+7d2e1f9c | < 0:0.6.1-3.module+el8.4.0+19462+14bde120 | < 0:0.6.1-3.module+el8.2.0+19461+3a40b6ee
  • mod_auth_openidc< 0:2.4.9.4-1.el9_0.2 | < 0:2.4.9.4-7.module+el8.10.0+23023+ba6d7066 | < 0:2.4.9.4-1.module+el8.8.0+23028+2aae5ce6.1 | < 0:2.4.9.4-1.module+el8.6.0+23040+515b7c43.1 | < 0:2.4.9.4-4.el9_4.1 | < 0:2.4.9.4-1.el9_2.2 | < 0:2.4.9.4-1.module+el8.4.0+23043+b69acfab.1 | < 0:2.4.9.4-1.module+el8.2.0+23039+41dcbbc6 | < 0:2.4.10-1.el9_6.1 | < 0:2.4.15-4.el10_0.1
Opensuse2 products
  • apache2-mod_auth_openidc&distro=openSUSE Leap 15.6< 2.3.8-150600.16.8.1
  • apache2-mod_auth_openidc&distro=openSUSE Tumbleweed< 2.4.16.11-1.1
Debian1 product
  • libapache2-mod-auth-openidc< 2.4.16.11-1 | < 2.4.12.3-2+deb12u3 | < 2.4.9.4-0+deb11u5
Mageia1 product
  • apache-mod_auth_openidc< 2.4.13.2-1.2.mga9
Openidc1 product
Ubuntu1 product
  • libapache2-mod-auth-openidcAll versions (No fix recorded) | < 2.4.11-1ubuntu0.1 | < 2.4.15.1-1ubuntu0.1

7 vendors · 30 products

References

43 links
Show all 43 references