Rapid7

vulnerability

Apache HTTPD: CVE-2021-40438: Server-Side Request Forgery (SSRF)

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Sep 16, 2021
Added
Oct 15, 2021
Modified
Apr 9, 2026

Description

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.

Solution

apache-httpd-upgrade-latest

References

    Title
    Rapid7 Labs

    2026 Global Threat Landscape Report

    The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.