VDB
DEBIAN-CVE-2021-39191
DEBIAN-CVE-2021-39191
PUBLISHED
CVSS 6.099999904632568 MEDIUM
mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9.4, the 3rd-party init SSO functionality of mod_auth_openidc was reported to be vulnerable to an open redirect attack by supplying a crafted URL in the `target_link_uri` parameter. A patch in version 2.4.9.4 made it so that the `OIDCRedirectURLsAllowed` setting must be applied to the `target_link_uri` parameter. There are no known workarounds aside from upgrading to a patched version.
Risk Scores
CVSS 3.1
6.099999904632568
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:11 | libapache2-mod-auth-openidc | 0, 2.4.9-1, 0 |
| Debian:14 | libapache2-mod-auth-openidc | 0, 0, 0 |
| Debian:13 | libapache2-mod-auth-openidc | 0, 0, 0 |
| Debian:12 | libapache2-mod-auth-openidc | 0, 0, 0 |
Timeline
- Sep 3, 2021 CVE Published
- Apr 28, 2026 CVE Updated