Is CVE-2023-52892 in the CISA KEV catalog?

No. CVE-2023-52892 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-52892?

CVE-2023-52892 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2023-52892?

CVE-2023-52892 has an EPSS score of 0.38% (29th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-52892?

Upgrade php-phpseclib on debian 12 to 2.0.42-1+deb12u3 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2023-52892

HIGH

7.5

CVSS v3

NVD

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.

CWE-436

How to fix

Remediation Available

php-phpseclibDebian

Fixed in:2.0.42-1+deb12u3CVE-2023-52892

Fixed in:2.0.46-1CVE-2023-52892

php-phpseclibUbuntu

Fixed in:2.0.1-1ubuntu0.1~esm2USN-7404-1

Fixed in:2.0.9-1ubuntu0.1~esm2USN-7404-1

Fixed in:2.0.23-2ubuntu0.1~esm2USN-7404-1

Fixed in:2.0.36-1ubuntu0.1~esm2USN-7404-1

php-phpseclib3Ubuntu

Fixed in:3.0.13-1ubuntu0.1~esm1USN-7404-1

php-seclibUbuntu

Fixed in:1.0.1-3ubuntu0.1+esm1USN-7404-1

Fixed in:1.0.9-1ubuntu0.1~esm1USN-7404-1

Fixed in:1.0.18-2ubuntu0.1~esm1USN-7404-1

Fixed in:1.0.20-1ubuntu0.1~esm1USN-7404-1

phpseclibUbuntu

Fixed in:1.0.1-3ubuntu0.1+esm1USN-7404-1

Fixed in:1.0.9-1ubuntu0.1~esm1USN-7404-1

Fixed in:1.0.18-2ubuntu0.1~esm1USN-7404-1

Fixed in:1.0.20-1ubuntu0.1~esm1USN-7404-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.38%probability of exploitation in 30 days

29thpercentile

Low risk: more likely to be exploited than 29% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Release Notes1

github.com

Other references1

github.com

Embed a live status badge for CVE-2023-52892

Markdown

[![CVE-2023-52892](https://tridentstack.com/cve/badge/CVE-2023-52892.svg)](https://tridentstack.com/cve/CVE-2023-52892)

HTML

<a href="https://tridentstack.com/cve/CVE-2023-52892"><img src="https://tridentstack.com/cve/badge/CVE-2023-52892.svg" alt="CVE-2023-52892"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-22.