🛡️ CVE-2021-40438 — apache
Description
mod_proxy SSRF
A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.
Affected software
CVE-2021-40438 is recorded against 1 package.
- apache
Timeline and source
Published on 6 March 2024 and last revised on 22 October 2025. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
cert-portal.siemens.com (Web)
httpd.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.apache.org (Web)
lists.debian.org (Web)
lists.fedoraproject.org (Web)
lists.fedoraproject.org (Web)
security.gentoo.org (Web)
security.netapp.com (Web)
tools.cisco.com (Web)
CVE-2021-40438 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| apache | — | — |
References
Similar Threats
- Critical CVE-2020-11984
- Medium CVE-2020-11985
- High CVE-2020-11993
- Medium CVE-2020-13938
- High CVE-2020-13950
More CVE 2021 advisories
Browse all of CVE 2021 in the advisory index.
Exploit Protection
Are you running apache?
CVE-2021-40438 carries CVSS 9.5 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.
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