CVE-2022-39261

Description

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.

How to fix CVE-2022-39261

To remediate CVE-2022-39261, upgrade the affected package to a fixed version below.

• —upgrade to 9.3.22 or later
• —upgrade to 2.14.3-1+deb11u2 or later
• —upgrade to 2.14.3-1+deb11u2 or later
• —upgrade to 2.6.2-2+deb10u1 or later
• —upgrade to 9.3.22 or later
• —upgrade to 1.44.7 or later

Is CVE-2022-39261 being exploited?

Low — EPSS is 1.5%, meaning exploitation activity has not been observed at scale.

Affected packages (6)

• >= 8.0.0, < 9.3.22, >= 9.4.0, < 9.4.7
• from 0, < 2.14.3-1+deb11u2
• from 0, < 2.14.3-1+deb11u2
• from 0, < 2.6.2-2+deb10u1
• >= 8.0.0, < 9.3.22 | >= 9.4.0, < 9.4.7
• >= 1.0.0, < 1.44.7

CVSS scores

References (22)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2022-39261
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-39261
• PATCHgithub.com/twigphp/Twig
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/twig/twig/CVE-2022-39261.yaml