CVE-2022-23527: mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP serve

Q: How do I fix CVE-2022-23527?

mod auth openidc: upgrade to 2.4.12.2; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2022-23527 being exploited?

CVE-2022-23527 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-23527 affect?

CVE-2022-23527 affects mod auth openidc, debian linux. Severity is medium (CVSS 4.7). mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP server. Versions prior to 2.4.12.2 are vulnerable to Open Redirect. When providing a logout parameter to the redirect URI, the existing

Q: How urgent is CVE-2022-23527?

Priority 37/100. On your watchlist

Routine

MEDIUM 4.7WATCHLISTUPGRADEMITIGATE

CVE-2022-23527 is a medium-severity flaw (CVSS 4.7) affecting mod auth openidc, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP server. Versions prior to 2.4.12.2 are vulnerable to Open Redirect. When providing a logout parameter to the redirect URI, the existing code in oidc_validate_redirect_url() does not properly check for URLs that start with /\t, leading to an open redirect. This issue has been patched in version 2.4.12.2. Users unable to upgrade can mitigate the

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-601
Published	2022-12-14
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: debian · openidc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-12-14 18:15 UTCPublished CVE record published
2026-06-17 04:30 UTCUpdated Record last modified

openidc mod auth openidc UPGRADE

Affected: < 2.4.12.2

Fixed in: 2.4.12.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mod-auth-openidc || rpm -q mod-auth-openidc || mod-auth-openidc --version

2. UPGRADE to 2.4.12.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mod-auth-openidc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mod-auth-openidc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-23527?

mod auth openidc: upgrade to 2.4.12.2; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-23527 being exploited?

CVE-2022-23527 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-23527 affect?

CVE-2022-23527 affects mod auth openidc, debian linux. Severity is medium (CVSS 4.7). mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP server. Versions prior to 2.4.12.2 are vulnerable to Open Redirect. When providing a logout parameter to the redirect URI, the existing

How urgent is CVE-2022-23527?

Priority 37/100. On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2024-24814 HIGH 7.5 UPGRADE MITIGATE mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP serve
CVE-2023-28625 HIGH 7.5 UPGRADE mod_auth_openidc is an authentication and authorization module for the Apache 2.x HTTP server that implements
CVE-2021-39191 MEDIUM 4.7 UPGRADE MITIGATE mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an
CVE-2021-32792 LOW 3.1 UPGRADE MITIGATE mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an
CVE-2021-32791 MEDIUM 5.9 UPGRADE MITIGATE mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an

References

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