What’s Vulnerable › Vulnerabilities
CVE-2018-19790
- Severity: medium (CVSS 6.1 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2018-12-18 · updated 2026-06-17
- Weakness: CWE-601
Description
An open redirect was discovered in Symfony 2.7.x before 2.7.50, 2.8.x before 2.8.49, 3.x before 3.4.20, 4.0.x before 4.0.15, 4.1.x before 4.1.9 and 4.2.x before 4.2.1. By using backslashes in the `_failure_path` input field of login forms, an attacker can work around the redirection target restrictions and effectively redirect the user to any domain after login.
Affected products
- Debian Linux: 8.0
- Fedoraproject Fedora: 28
- symfony: from 2.7.0 before 2.7.50; from 2.8.0 before 2.8.49; from 3.0.0 before 3.4.20; from 4.0.0 before 4.0.15; from 4.1.0 before 4.1.9; from 4.2.0 before 4.2.1 — fixed in 2.7.50, 2.8.49, 3.4.20, 4.0.15, 4.1.9, 4.2.1
How to fix
Upgrade to a fixed version: symfony 2.7.50, 2.8.49, 3.4.20, 4.0.15. Check the vendor advisory for mitigations.
References
- http://www.securityfocus.com/bid/106249
- https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4TD3E7FZIXLVFG3SMFJPDEKPZ26TJOW7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZMRJ7VTHCY5AZK24G4QGX36RLUDTDKE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OA4WVFN5FYPIXAPLWZI6N425JHHDSWAZ/
- https://seclists.org/bugtraq/2019/May/21
- https://symfony.com/blog/cve-2018-19790-open-redirect-vulnerability-when-using-security-http
- https://www.debian.org/security/2019/dsa-4441
- http://www.securityfocus.com/bid/106249
- https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4TD3E7FZIXLVFG3SMFJPDEKPZ26TJOW7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZMRJ7VTHCY5AZK24G4QGX36RLUDTDKE/
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