Paper/Archive/CVE-2025-23048

CVE-2025-23048

Apache Software Foundation Apache HTTP Server — Apache HTTP Server: mod_ssl access control bypass with session resumption

EPSS 1%public exploit CVSS 9.1

critical.is priorityof 100

CVSS 9.1 (ADP)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 64.0.640 × 2012.8 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

Apache HTTP Server2.4.35 – 2.4.63–CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

advisoryhttpd.apache.org/security/vulnerabilities_24.html reflists.debian.org/debian-lts-announce/2025/08/msg00009.html refopenwall.com/lists/oss-security/2025/07/10/2 refopenwall.com/lists/oss-security/2025/07/10/8