What’s Vulnerable › Vulnerabilities

CVE-2024-28861: Gadget chain in Symfony 1 due to uncontrolled unserialized input in sfNamespacedParameterHolder

• Severity: critical (CVSS 9.8 v3.1)
• 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: yes
• Published: 2024-03-22 · updated 2026-06-17
• Weakness: CWE-502

Description

Symfony 1 is a community-driven fork of the 1.x branch of Symfony, a PHP framework for web projects. Starting in version 1.1.0 and prior to version 1.5.19, Symfony 1 has a gadget chain due to dangerous deserialization in `sfNamespacedParameterHolder` class that would enable an attacker to get remote code execution if a developer deserializes user input in their project. Version 1.5.19 contains a patch for the issue.

Affected products

• FriendsOfSymfony1 symfony1: from 1.1.0 before 1.5.9 — fixed in 1.5.9

How to fix

Upgrade to a fixed version: FriendsOfSymfony1 symfony1 1.5.9. Check the vendor advisory for mitigations.

References

• https://github.com/FriendsOfSymfony1/symfony1/commit/0bd9d59c69221f49bfc8be8b871b79e12d7d171a
• https://github.com/FriendsOfSymfony1/symfony1/security/advisories/GHSA-pv9j-c53q-h433
• https://github.com/FriendsOfSymfony1/symfony1/commit/0bd9d59c69221f49bfc8be8b871b79e12d7d171a
• https://github.com/FriendsOfSymfony1/symfony1/security/advisories/GHSA-pv9j-c53q-h433

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