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cve.new
GHSA-7cvr-xhm5-x998medium5.3

Twig Path Traversal vulnerability in the filesystem loader

No CVE assignedCheck your stack

The advisory, in context

Twig is affected by path traversal vulnerability when used with Twig_Loader_Filesystem for loading Twig templates but only if the application is using non-trusted template names (names provided by a end-user for instance).

When affected, it is possible to go up one directory for the paths configured in the application's loader.

For instance, if the filesystem loader is configured with /path/to/templates as a path to look for templates, an attacker can force Twig to include a file stored in /path/to by prepending the path with /../ like in {% include "/../somefile_in_path_to" %}

Note that using anything else (like ../somefile, /../../somefile, or ../../somefile) won’t work and the application will return a proper exception.

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

twig/twig Packagist
Ecosystem versions

From 1.0.0 before 1.12.3

Fixed in 1.12.3

28 explicitly affected versions

1.3.0, 1.4.0, 1.5.0, 1.5.1, 1.6.0, 1.6.1, 1.6.2, 1.6.3, 1.6.4, 1.6.5, v1.10.0, v1.10.1, v1.10.2, v1.10.3, v1.11.0, v1.11.1, v1.12.0, v1.12.0-RC1, v1.12.1, v1.12.2, v1.7.0, v1.8.0, v1.8.1, v1.8.2, v1.8.3, v1.9.0, v1.9.1, v1.9.2

View affected-version evidence
{
  "ranges": [
    {
      "events": [
        {
          "introduced": "1.0.0"
        },
        {
          "fixed": "1.12.3"
        }
      ],
      "type": "ECOSYSTEM"
    }
  ],
  "versions": [
    "1.3.0",
    "1.4.0",
    "1.5.0",
    "1.5.1",
    "1.6.0",
    "1.6.1",
    "1.6.2",
    "1.6.3",
    "1.6.4",
    "1.6.5",
    "v1.10.0",
    "v1.10.1",
    "v1.10.2",
    "v1.10.3",
    "v1.11.0",
    "v1.11.1",
    "v1.12.0",
    "v1.12.0-RC1",
    "v1.12.1",
    "v1.12.2",
    "v1.7.0",
    "v1.8.0",
    "v1.8.1",
    "v1.8.2",
    "v1.8.3",
    "v1.9.0",
    "v1.9.1",
    "v1.9.2"
  ]
}

References