9.1

CVE-2025-23048: apache software foundation apache http server Improper Access Control

CVSS: 9.1v3.1CriticalModified
AliasesALPINE-CVE-2025-23048UBUNTU-CVE-2025-23048DEBIAN-CVE-2025-23048
Published 10-07-2025Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-23048 is a critical (CVSS 9.1) Improper Access Control vulnerability in apache software foundation apache http server. EPSS estimates a 1.04% chance of exploitation in the next 30 days, higher than 63.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
1.04%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 22 · Related 10
DLA-4270-1MGASA-2025-0301OPENSUSE-SU-2025:15360-1RHSA-2025:13680RHSA-2025:14901RHSA-2025:14902

Timeline

  1. 10-07-2025
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

1.04%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

+0.03 pp

From 1.00% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.04%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • apache2< 2.4.64-r0
Apache1 product
Apache software foundation1 product
Chainguard1 product
  • apache2All versions (No fix recorded)
Debian1 product
  • apache2< 2.4.65-1~deb12u1 | < 2.4.64-1
Ubuntu1 product
  • apache2< 2.4.18-2ubuntu3.17+esm16 | < 2.4.29-1ubuntu4.27+esm6 | < 2.4.41-4ubuntu3.23+esm2 | < 2.4.52-1ubuntu4.15 | < 2.4.58-1ubuntu8.7
Wolfi1 product
  • apache2All versions (No fix recorded)

7 vendors · 7 products

References

13 links
Show all 13 references