CVE-2023-27522

Name: CVE-2023-27522
Creator: NVD / NIST
Published: 2023-03-07T16:15:09.613+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.13%

Last modified Jun 17, 2026

CVE-2023-27522 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client.. EPSS estimates a 2.13% chance of exploitation in the next 30 days.

Description

HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client.

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

2.13%

79.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Apache	Http Server	>= 2.4.30, < 2.4.56
Debian	Debian Linux	10.0
Unbit	Uwsgi	< 2.0.22

References

https://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00028.htmlThird Party Advisory
https://security.gentoo.org/glsa/202309-01Third Party Advisory
https://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00028.htmlThird Party Advisory
https://security.gentoo.org/glsa/202309-01Third Party Advisory

Timeline

Published: Mar 7, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-27522?

How severe is CVE-2023-27522?

CVE-2023-27522 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.13% probability of exploitation in the next 30 days.

How do I fix CVE-2023-27522?

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-2023-27522?

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

Scan your code now

Source: NVD / NIST