CVE-2025-23048
CRITICAL9.1EPSS 0.06%Apache HTTP Server: mod_ssl access control bypass with session resumption
Published: 7/10/2025Modified: 4/28/2026
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.
Affected packages (3)
- Alpine/apache2from 0, < 2.4.64-r0
- Bitnami/apache>= 2.4.35, < 2.4.64
- Debian/apache2from 0, < 2.4.65-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
References (7)
- ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2025-23048
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2025-23048
- WEBhttps://httpd.apache.org/security/vulnerabilities_24.html
- WEBhttps://lists.debian.org/debian-lts-announce/2025/08/msg00009.html
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2025-23048
- WEBhttp://www.openwall.com/lists/oss-security/2025/07/10/2
- WEBhttp://www.openwall.com/lists/oss-security/2025/07/10/8