SARA / Free Tools / CVE / CVE-2023-27522

CVE-2023-27522 — HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi

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.

CVSS

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EPSS

0.62% (top 30.30%)

CWE

CWE-444

Published

2023-03-07T15:09:30.122Z

Last modified

2025-02-13T16:45:26.302Z

CVSS vector

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01What is this vulnerability?

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.

Vendor	Product	Versions
Apache Software Foundation	Apache HTTP Server	2.4.30

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

Patch to a fixed version listed in the vendor advisory (see references below).
Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
Hunt historical logs for exploitation indicators — see Detection signatures below.

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

httpd.apache.org — https://httpd.apache.org/security/vulnerabilities_24.html
lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html
security.gentoo.org — https://security.gentoo.org/glsa/202309-01

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