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GHSA-5c58-w9xc-qcj9 symfony/symfony

Fix: symfony/symfony#14167

GHSA-5c58-w9xc-qcj9 is a Code Injection vulnerability in symfony/symfony. A fix is available for symfony/symfony — see the affected versions and patch details below.

Symfony Vulnerable to PHP Eval Injection

Also known asCVE-2015-2308
Published
May 17, 2022
Updated
Dec 8, 2024
Affected
6 pkgs
Patched
6 / 6
Exploits
None indexed
Exploitation data as of Sep 18, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs71th percentile — riskier than 71% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

6 pkgs affected
🐘symfony/symfony🐘symfony/symfony🐘symfony/symfony🐘symfony/http-kernel🐘symfony/http-kernel🐘symfony/http-kernel

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Applications with ESI support (and SSI support as of Symfony 2.6) enabled and using the Symfony built-in reverse proxy (the `Symfony\Component\HttpKernel\HttpCache class) are vulnerable to PHP code injection; a malicious user can inject PHP code that will be executed by the server.

HttpCache uses eval() to execute files in its cache when they contain ESI tags (and only when ESI is enabled). The vulnerability comes from the fact that PHP allows contents of <script language="php"> tags to be executed (and this kind of PHP tags is always available regardless of the configuration), but there were not escaped before the evaluation.

A possible exploit comes from websites also vulnerable to Cross-Site Scripting as an attacker can successfully conduct a PHP code injection attack by passing such a tag in a user submitted variable (for which proper output escaping was not applied).

Affected Packages

6 total 6 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistsymfony/symfony2.0.0&&< 2.3.272.3.27composer require symfony/symfony:^2.3.27
🐘Packagistsymfony/symfony2.4.0&&< 2.5.112.5.11composer require symfony/symfony:^2.5.11
🐘Packagistsymfony/symfony2.6.0&&< 2.6.62.6.6composer require symfony/symfony:^2.6.6
🐘Packagistsymfony/http-kernel2.0.0&&< 2.3.272.3.27composer require symfony/http-kernel:^2.3.27
🐘Packagistsymfony/http-kernel2.4.0&&< 2.5.112.5.11composer require symfony/http-kernel:^2.5.11
🐘Packagistsymfony/http-kernel2.6.0&&< 2.6.62.6.6composer require symfony/http-kernel:^2.6.6

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for symfony/symfony, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update symfony/symfony to 2.3.27 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-5c58-w9xc-qcj9 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-5c58-w9xc-qcj9 can be triaged on real exposure rather than presence alone.

Tailored to GHSA-5c58-w9xc-qcj9. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Applications with ESI support (and SSI support as of Symfony 2.6) enabled and using the Symfony built-in reverse proxy (the `Symfony\Component\HttpKernel\HttpCache class) are vulnerable to PHP code injection; a malicious user can inject PHP code that will be executed by the server. HttpCache uses eval() to execute files in its cache when they contain ESI tags (and only when ESI is enabled). The vulnerability comes from the fact that PHP allows contents of <script language="php"> tags to be executed (and this kind of PHP tags is always available regardless of the configuration), but there were
O3 Security · Impact-Aware SCA

Is GHSA-5c58-w9xc-qcj9 in your dependencies?

O3 Security finds GHSA-5c58-w9xc-qcj9 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

GHSA-5c58-w9xc-qcj9: symfony/symfony RCE | O3 Security