$ cve CVE-2023-25690 JSON

CVE-2023-25690

9.8

CRITICAL · CVSS 3.1 · EPSS 84.5% (pctl 100)

Patch early

EPSS 84.5% — above the 10% action threshold.

Description

Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack. Configurations are affected when mod_proxy is enabled along with some form of RewriteRule or ProxyPassMatch in which a non-specific pattern matches some portion of the user-supplied request-target (URL) data and is then re-inserted into the proxied request-target using variable substitution. For example, something like: RewriteEngine on RewriteRule "^/here/(.*)" "http://example.com:8080/elsewhere?$1"; [P] ProxyPassReverse /here/ http://example.com:8080/ Request splitting/smuggling could result in bypass of access controls in the proxy server, proxying unintended URLs to existing origin servers, and cache poisoning. Users are recommended to update to at least version 2.4.56 of Apache HTTP Server.

Scoring

CVSS	9.8 (CRITICAL, v3.1)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS	84.51% — more likely to be exploited than 100% of all CVEs
Weakness	CWE-444
On CISA KEV	no
Public exploit	none known
Published	2023-03-07
Last modified	2026-06-17

Affected (1)

Vendor	Product
apache	http server

References

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