CVE-2023-33201Network attack vector

LDAP attribute disclosure via unescaped certificate subjects

Published Jul 5, 2023 · Updated Dec 4, 2024

LDAP injection in Bouncy Castle For Java before 1.74 allows remote attackers to enumerate LDAP attributes via crafted certificates. X509LDAPCertStoreSpi concatenates an X.500 subject name into an LDAP search filter without escaping wildcard and filter metacharacters. Exploitation requires an application to use the LDAP CertStore for X.509 validation and an LDAP directory whose responses or errors expose boolean-query differences.

CVSS severity5.3
Medium
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LDAP injection in Bouncy Castle For Java before 1.74 allows remote attackers to enumerate LDAP attributes via crafted certificates. X509LDAPCertStoreSpi concatenates an X.500 subject name into an LDAP search filter without escaping wildcard and filter metacharacters. Exploitation requires an application to use the LDAP CertStore for X.509 validation and an LDAP directory whose responses or errors expose boolean-query differences.

The record

CVE
CVE-2023-33201
Published
Jul 5, 2023
Updated
Dec 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-295
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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