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Vulnerability record · CVE-2022-2255 · published 25 August 2022

CVE-2022-2255: Modwsgi mod wsgi insufficient verification of data authenticity vulnerability

MModwsgi · Mod Wsgi

A vulnerability was found in mod_wsgi. The X-Client-IP header is not removed from a request from an untrusted proxy, allowing an attacker to pass the X-Client-IP header to the target WSGI application because the condition to remove it is missing.

7.5 CVSS 3.1 High EPSS 0.88% · top 42.5% CWE-348 · CWE-348CWE-345 · Insufficient verification of data authenticity
7.5CVSS 3.1 base score
0.88%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability was found in mod_wsgi. The X-Client-IP header is not removed from a request from an untrusted proxy, allowing an attacker to pass the X-Client-IP header to the target WSGI application because the condition to remove it is missing.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L13940-L13941 ExploitThird Party Advisory
https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L14046-L14082 ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00021.html Mailing ListThird Party Advisory
https://modwsgi.readthedocs.io/en/latest/release-notes/version-4.9.3.html Release NotesThird Party Advisory
https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L13940-L13941 ExploitThird Party Advisory
https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L14046-L14082 ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00021.html Mailing ListThird Party Advisory
https://modwsgi.readthedocs.io/en/latest/release-notes/version-4.9.3.html Release NotesThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2022-2255), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.