Cyber Resilience

CVE-2023-52892

HighPublic PoC

Published: 27 June 2024

Published
27 June 2024
Modified
22 October 2025
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0018 39.8th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-52892 is a high-severity Interpretation Conflict (CWE-436) vulnerability in Phpseclib Phpseclib. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 39.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

more

confusion in X.509 certificate host verification.

CWE(s)
CWE-436

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

phpseclib
phpseclib
1.0.0 — 1.0.22 · 2.0.0 — 2.0.46 · 3.0.0 — 3.0.33

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References