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CVE-2025-23048

Apache HTTP Server broken access control

9.1 CRITICALEPSS 1.03%
  1. Published10 Jul 2025

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Apache HTTP Server≥ 2.4.35 < 2.4.64

Remediation

Fixed in
Apache HTTP Server≥ 2.4.64

References

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Frequently asked

Is CVE-2025-23048 being actively exploited?

CVE-2025-23048 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.03%.

How severe is CVE-2025-23048?

CVE-2025-23048 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 1.03% probability of exploitation.

Which products are affected by CVE-2025-23048?

Affected products include Apache HTTP Server.

How do I fix CVE-2025-23048?

Upgrade affected software to a fixed version, for example Apache HTTP Server 2.4.64 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-23048 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.