CVE-2022-23527 - CVE House

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Status published Medium CVE-2022-23527

Open Redirect in oidc_validate_redirect_url()

4.7 CVSS

Vulnerability Description

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 issue by configuring mod_auth_openidc to only allow redirection when the destination matches a given regular expression with OIDCRedirectURLsAllowed.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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URL Redirection to Untrusted Site ('Open Redirect') in mod_auth_openidc

XSS vulnerability when using OIDCPreservePost On in mod_auth_openidc

Hardcoded static IV and AAD with a reused key in AES GCM encryption in mod_auth_openidc

Open Redirect in oidc_validate_redirect_url()

Format string bug in the Redis cache implementation

Affected Vendor

zmartzone

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Affected Software

mod_auth_openidc

Vulnerable Versions:

< 2.4.12.2

Timeline

Official Publish: December 14th, 2022

Last Modified: April 18th, 2025

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1204 User Execution

T1071 Application Layer Protocol

Command and Control

T1189 Drive-by Compromise

T1036 Masquerading

Defense Evasion