CVE-2022-2255

Name: CVE-2022-2255
Creator: NVD / NIST
Published: 2022-08-25T18:15:09.993+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2022-2255 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.69%

48.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Modwsgi	Mod Wsgi	< 4.9.3
Debian	Debian Linux	10.0

References

https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L13940-L13941Exploit, Third Party Advisory
https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L14046-L14082Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00021.htmlMailing List, Third Party Advisory
https://modwsgi.readthedocs.io/en/latest/release-notes/version-4.9.3.htmlRelease Notes, Third Party Advisory
https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L13940-L13941Exploit, Third Party Advisory
https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L14046-L14082Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00021.htmlMailing List, Third Party Advisory
https://modwsgi.readthedocs.io/en/latest/release-notes/version-4.9.3.htmlRelease Notes, Third Party Advisory

Timeline

Published: Aug 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-2255?

How severe is CVE-2022-2255?

CVE-2022-2255 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2022-2255?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-2255?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST