Vulnerability Report

CVE-2016-2403

Title: Sensiolabs Symfony Auth Bypass

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2016-2403.

CWE Category CWE-287

Published Date Feb 07, 2017

Modified Date May 13, 2026

Exploit Status Not Found

Score 9.8 CVSS v3.0

Exploit Probability (EPSS)

2.92%

Vulnerability Summary

CVE-2016-2403: Symfony before 2.8.6 and 3.x before 3.0.6 allows remote attackers to bypass authentication by logging in with an empty password and valid username, which triggers an unauthenticated bind.

Impacted Vendors

sensiolabs 1

auth0 1

Reference Links

http://symfony.com/blog/cve-2016-2403-unauthorized-access-on-a-misconfigured-ldap-server-when-using-an-empty-password http://www.securityfocus.com/bid/96137 https://www.debian.org/security/2018/dsa-4262 http://symfony.com/blog/cve-2016-2403-unauthorized-access-on-a-misconfigured-ldap-server-when-using-an-empty-password http://www.securityfocus.com/bid/96137 https://www.debian.org/security/2018/dsa-4262

CVSS v3.0

Source Entity [email protected]

Severity CRITICAL

9.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.5

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns