CVE-2025-61912

MEDIUM EPSS 33.5%
Published Oct 10, 20258mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 4.0
Medium
Find Similar
Published Oct 10, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
33.5% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-116
CWE-170

Affected Products 1

VendorProductVersionRange
python-ldappython-ldap* <3.4.5

References 3

  • github.com https://github.com/python-ldap/python-ldap/commit/6ea80326a34ee6093219628d7690bced50c49a3f
    Patch
  • github.com https://github.com/python-ldap/python-ldap/releases/tag/python-ldap-3.4.5
    Release Notes
  • github.com https://github.com/python-ldap/python-ldap/security/advisories/GHSA-p34h-wq7j-h5v6
    ExploitThird Party Advisory

Remediation

  • github.com https://github.com/python-ldap/python-ldap/commit/6ea80326a34ee6093219628d7690bced50c49a3f
    Patch