Twig may load a template outside a configured directory when using the filesystem loader
CVE-2022-39261

7.5HIGH

Key Information:

Vendor

TwigPHP

Status
Twig
Vendor
CVE Published:
28 September 2022

What is CVE-2022-39261?

Twig is a template language for PHP. Versions 1.x prior to 1.44.7, 2.x prior to 2.15.3, and 3.x prior to 3.4.3 encounter an issue when the filesystem loader loads templates for which the name is a user input. It is possible to use the source or include statement to read arbitrary files from outside the templates' directory when using a namespace like @somewhere/../some.file. In such a case, validation is bypassed. Versions 1.44.7, 2.15.3, and 3.4.3 contain a fix for validation of such template names. There are no known workarounds aside from upgrading.

Affected Version(s)

Twig => 1.0.0, < 1.44.7 > 1.0.0, 1.44.7

Twig >= 2.0.0, < 2.15.3 < 2.0.0, 2.15.3

Twig >= 3.0.0, < 3.4.3 < 3.0.0, 3.4.3

References

https://github.com/twigphp/Twig/security/advisories/GHSA-...
https://github.com/twigphp/Twig/commit/35f3035c5deb0041da...
https://www.drupal.org/sa-core-2022-016

EPSS Score

9% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.