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The vulnerability in pgAdmin versions up to and including 9.9 stems from an insecure default configuration in its LDAP authentication module. When pgAdmin is configured to use LDAP with TLS (LDAPS), the underlying connection library fails to properly validate the server’s X.509 certificate. This occurs because the code does not enforce standard certificate verification checks, such as validating the certificate chain against a trusted Certificate Authority (CA), confirming the certificate’s expiration date, or verifying that the certificate’s Common Name (CN) matches the hostname of the LDAP server being connected to. An attacker exploiting this flaw can perform a man-in-the-middle (MITM) attack by presenting any self-signed or invalid certificate during the TLS handshake. pgAdmin will accept this illegitimate certificate and proceed to transmit the user’s LDAP credentials over the encrypted-but-compromised channel, allowing the attacker to intercept these sensitive authentication details.
Platform: pgAdmin
Version: <= 9.9
Vulnerability: LDAP TLS Bypass
Severity: High
date: 2025-11-13
Prediction: Patch by 2025-11-27
What Undercode Say:
ldapsearch -x -H ldaps://malicious-server:636 -b "dc=example,dc=com"
import ssl context = ssl.create_default_context() context.check_hostname = False context.verify_mode = ssl.CERT_NONE
How Exploit:
Intercept LDAPS connection.
Present invalid certificate.
Capture user credentials.
Protection from this CVE
Update pgAdmin version.
Enforce certificate verification.
Use trusted CA certificates.
Impact:
Credential Theft
Authentication Bypass
MITM Attacks
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Sources:
Reported By: github.com
Extra Source Hub:
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