How severe is CVE-2023-52892?

CVE-2023-52892 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-52892 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-52892?

CVE-2023-52892 affects Phpseclib. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-52892?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-52892 have an EU (EUVD) identifier?

Yes. CVE-2023-52892 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2038.

When was CVE-2023-52892 published?

CVE-2023-52892 was published on 2024-06-27 and last updated on 2026-06-17.

CVE-2023-52892

CVE-2023-52892 is a high-severity vulnerability in Phpseclib with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-436.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-2038
Weakness: CWE-436
Affected product: Phpseclib
Published: 2024-06-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-52892?: 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.
How severe is CVE-2023-52892?: CVE-2023-52892 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-52892 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-52892?: CVE-2023-52892 affects Phpseclib. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-52892?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-52892 have an EU (EUVD) identifier?: Yes. CVE-2023-52892 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2038.
When was CVE-2023-52892 published?: CVE-2023-52892 was published on 2024-06-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*

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