CVE-2025-23048

Critical

Description

In some mod_ssl configurations on Apache HTTP Server 2.4.35 through to 2.4.63, an access control bypass by trusted clients is possible using TLS 1.3 session resumption. Configurations are affected when mod_ssl is configured for multiple virtual hosts, with each restricted to a different set of trusted client certificates (for example with a different SSLCACertificateFile/Path setting). In such a case, a client trusted to access one virtual host may be able to access another virtual host, if SSLStrictSNIVHostCheck is not enabled in either virtual host.

SeverityCritical

CVSS9.1

Exploit probability—

Product

Apache Http Server

PublishedJul 10, 2025

First seenJul 10, 2025

Weakness typeCWE-284Improper access control

How to fix

Update

apache http_server2.4.64 or later

Vendor advisories

httpd.apache.org/security/vulnerabilities_24.html

Affected products

Product	Affected versions	Fixed in
apache http_server	2.4.35 ≤ v < 2.4.64	2.4.64

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