CVE-2023-52892

Name: CVE-2023-52892
Creator: NVD / NIST
Published: 2024-06-27T22:15:10.277+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.38%

Last modified Jun 17, 2026

CVE-2023-52892 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.. EPSS estimates a 0.38% chance of exploitation in the next 30 days.

Description

In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.38%

29.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-436

Affected Software

Vendor	Product	Versions
Phpseclib	Phpseclib	>= 1.0.0, < 1.0.22
Phpseclib	Phpseclib	>= 2.0.0, < 2.0.46
Phpseclib	Phpseclib	>= 3.0.0, < 3.0.33

References

https://github.com/phpseclib/phpseclib/commit/6cd6e8ceab9f2b55c8cd81d2192bf98cbeaf4627Patch
https://github.com/phpseclib/phpseclib/issues/1943Exploit, Issue Tracking
https://github.com/phpseclib/phpseclib/releases/tag/3.0.33Release Notes
https://github.com/x509-name-testing/name_testing_artifactsNot Applicable
https://github.com/phpseclib/phpseclib/commit/6cd6e8ceab9f2b55c8cd81d2192bf98cbeaf4627Patch
https://github.com/phpseclib/phpseclib/issues/1943Exploit, Issue Tracking
https://github.com/phpseclib/phpseclib/releases/tag/3.0.33Release Notes
https://github.com/x509-name-testing/name_testing_artifactsNot Applicable

Timeline

Published: Jun 27, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-52892?

How severe is CVE-2023-52892?

CVE-2023-52892 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.38% probability of exploitation in the next 30 days.

How do I fix CVE-2023-52892?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-52892?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST