XSS in Apache HTTP Server
CVE-2021-32792
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`.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.015 (73.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: -0.000
Affected products
- Apache HTTP Server
- Openidc Mod Auth
- Zmartzone Mod Auth Openidc — versions < 2.4.9
- Fedoraproject Fedora — versions 33, 34
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9 (Third Party Advisory, Release Notes)
- github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-458c-7pwg-3j7j (Patch, Third Party Advisory)
- github.com/zmartzone/mod_auth_openidc/commit/00c315cb0c8ab77c67be4a2ac08a71a83a… (Patch, Third Party Advisory)
- github.com/zmartzone/mod_auth_openidc/commit/55ea0a085290cd2c8cdfdd960a230cbc38… (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/04/msg00034.html (mailing-list)
Frequently asked questions
- What is CVE-2021-32792?
- CVE-2021-32792 is a low-severity vulnerability in Apache HTTP Server, classified under Cross-site Scripting. CVSS score: 3.1/10. Published 2021-07-26.
- How severe is CVE-2021-32792?
- Low severity. CVSS v3 base score is 3.1 out of 10.
- Is CVE-2021-32792 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.