CVE-2016-2403
Published:February 07, 2017
Updated:September 23, 2026
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.
Affected Packages
symfony/symfony (PHP):
Affected version(s) >=v2.8.0 <v2.8.6Fix Suggestion:
Update to version v2.8.6symfony/security-core (PHP):
Affected version(s) >=v2.8.0 <v2.8.6Fix Suggestion:
Update to version v2.8.6symfony/security (PHP):
Affected version(s) >=v2.8.0 <v2.8.6Fix Suggestion:
Update to version v2.8.6symfony/security-core (PHP):
Affected version(s) >=v3.0.0 <v3.0.6Fix Suggestion:
Update to version v3.0.6symfony/security (PHP):
Affected version(s) >=v3.0.0 <v3.0.6Fix Suggestion:
Update to version v3.0.6symfony/symfony (PHP):
Affected version(s) >=v3.0.0 <v3.0.6Fix Suggestion:
Update to version v3.0.6Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Authentication
EPSS
Base Score:
2.93