CVE-2025-23048

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.1 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
apacheCNA
---
---
CISA-ADPADP
9.1 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 35%
VendorProductVersion
apachehttp_server
2.4.35 ≤
𝑥
< 2.4.64
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
apache2
bullseye
vulnerable
bullseye (security)
2.4.65-1~deb11u1
fixed
bookworm
2.4.65-1~deb12u1
fixed
bookworm (security)
vulnerable
trixie
2.4.65-2
fixed
forky
2.4.65-3
fixed
sid
2.4.65-3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
apache2
questing
Fixed 2.4.64-1ubuntu1
released
plucky
Fixed 2.4.63-1ubuntu1.1
released
noble
Fixed 2.4.58-1ubuntu8.7
released
jammy
Fixed 2.4.52-1ubuntu4.15
released
focal
Fixed 2.4.41-4ubuntu3.23+esm2
released
bionic
Fixed 2.4.29-1ubuntu4.27+esm6
released
xenial
Fixed 2.4.18-2ubuntu3.17+esm16
released
trusty
needs-triage
Common Weakness Enumeration
References
https://httpd.apache.org/security/vulnerabilities_24.html
http://www.openwall.com/lists/oss-security/2025/07/10/2
http://www.openwall.com/lists/oss-security/2025/07/10/8
https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html