What is CVE-2025-61912?

CVE-2025-61912 is a medium-severity vulnerability in Python-Ldap, classified under Improper Encoding or Escaping of Output. CVSS score: 5.3/10. Published 2025-10-10.

How severe is CVE-2025-61912?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Python-Ldap

CVE-2025-61912

python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, ldap.dn.escape_dn_chars() escapes \x00 incorrectly by emitting a backslash followed by a literal NUL byte instead of the RFC-4514 hex form \00. Any application that uses this helper to construct DNs from untrusted input can be made to consistently fail before a request is sent to the LDAP server (e.g., AD), resulting in a client-side denial of service. Version 3.4.5 contains a patch for the issue.

EPSS: 0.004 (35.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Python-ldap — versions < 3.4.5

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2025-61912?: CVE-2025-61912 is a medium-severity vulnerability in Python-Ldap, classified under Improper Encoding or Escaping of Output. CVSS score: 5.3/10. Published 2025-10-10.
How severe is CVE-2025-61912?: Medium severity. CVSS v3 base score is 5.3 out of 10.