CVE-2025-23048
Apache HTTP Server: mod_ssl access control bypass with session resumption
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-284 |
| Vendor | apache software foundation |
| Product | apache http server |
| Published | Jul 10, 2025 |
| Last Updated | Feb 26, 2026 |
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Affected Versions
Apache Software Foundation / Apache HTTP Server
2.4.35 ≤ 2.4.63
References
httpd.apache.org: https://httpd.apache.org/security/vulnerabilities_24.html lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html openwall.com: http://www.openwall.com/lists/oss-security/2025/07/10/2 openwall.com: http://www.openwall.com/lists/oss-security/2025/07/10/8
Credits
Sven Hebrok, Felix Cramer, Tim Storm, Maximilian Radoy, and Juraj Somorovsky at Paderborn University