CVE-2021-32792 XSS vulnerability when using OIDCPreservePost On in mod_auth_openidc

What is CVE-2021-32792?

CVE-2021-32792 is a low-severity cross-site scripting vulnerability in Fedoraproject Fedora, published on 26 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

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 mod_auth_openidc before version 2.4.9, there is an XSS vulnerability in when using `OIDCPreservePost On`.

Weakness: CWE-79

Which versions are affected by CVE-2021-32792?

It affects 2 products.

Products include Fedoraproject Fedora, Openidc Mod Auth Openidc.

How do I fix CVE-2021-32792?

Upgrade to a fixed version.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-32792 being exploited?

There is no known exploitation of CVE-2021-32792 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-6482, DEBIAN-CVE-2021-32792, GHSA-458c-7pwg-3j7j, UBUNTU-CVE-2021-32792.