What’s Vulnerable › Vulnerabilities

CVE-2016-2403

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-02-07 · updated 2026-06-17
• Weakness: CWE-287

Description

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 products

• symfony: 2.8.0, 2.8.1, 2.8.2, 2.8.3, 2.8.4, 2.8.5 (+6)

References

• 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

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