CVE-2021-40438

CRITICAL9.0⚠ KEVEPSS 94.4%

mod_proxy SSRF

Published: 9/16/2021Modified: 10/22/2025Added to CISA KEV: 12/1/2021
Also known as:ALPINE-CVE-2021-40438BIT-apache-2021-40438

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.

Affected packages (3)

CVSS scores

SourceVersionSeverityVector
osvCVSS 3.1CRITICAL9.0CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

References (23)