What’s Vulnerable › Vulnerabilities

CVE-2017-16652

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-13 · updated 2026-06-17
• Weakness: CWE-601

Description

An issue was discovered in Symfony 2.7.x before 2.7.38, 2.8.x before 2.8.31, 3.2.x before 3.2.14, and 3.3.x before 3.3.13. DefaultAuthenticationSuccessHandler or DefaultAuthenticationFailureHandler takes the content of the _target_path parameter and generates a redirect response, but no check is performed on the path, which could be an absolute URL to an external domain. This Open redirect vulnerability can be exploited for example to mount effective phishing attacks.

Affected products

• Debian Linux: 8.0
• symfony: from 2.7.0 (excl.) before 2.7.38; from 2.8.0 (excl.) before 2.8.31; from 3.2.0 (excl.) before 3.2.14; from 3.3.0 before 3.3.13 — fixed in 2.7.38, 2.8.31, 3.2.14, 3.3.13

How to fix

Upgrade to a fixed version: symfony 2.7.38, 2.8.31, 3.2.14, 3.3.13. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
• https://symfony.com/blog/cve-2017-16652-open-redirect-vulnerability-on-security-handlers
• https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
• https://symfony.com/blog/cve-2017-16652-open-redirect-vulnerability-on-security-handlers

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