Access Control Bypass Affecting apache/httpd package, versions [2.4.35 ,2.4.64-rc1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published3 Aug 2025
- disclosed14 Jul 2025
- creditSven Hebrok, Felix Cramer, Tim Storm, Maximilian Radoy, Juraj Somorovsky
Introduced: 14 Jul 2025
CVE-2025-23048 (opens in a new tab)How to fix?
Upgrade apache/httpd to version 2.4.64-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Access Control Bypass via the ssl_hook_ReadReq() when configured for multiple virtual hosts, each with a different set of trusted client certificates. An attacker can gain unauthorized access to another virtual host by leveraging TLS 1.3 session resumption if they already possess valid client certificates for one host.
Note: This is only exploitable if the SSLStrictSNIVHostCheck directive is not enabled on either virtual host and the server is configured with complex, multi-tenant SSL client authentication setups.