CVE-2021-21353 Information

Description

Pug is an npm package which is a high-performance template engine. In pug before version 3.0.1 if a remote attacker was able to control the pretty option of the pug compiler e.g. if you spread a user provided object such as the query parameters of a request into the pug template inputs it was possible for them to achieve remote code execution on the node.js backend. This is fixed in version 3.0.1. This advisory applies to multiple pug packages including \pug\ \pug-code-gen. pug-code-gen has a backported fix at version 2.0.3. This advisory is not exploitable if there is no way for un-trusted input to be passed to pug as the pretty option e.g. if you compile templates in advance before applying user input to them you do not need to upgrade.

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Reference

https://github.com/pugjs/pug/pull/3314 https://github.com/pugjs/pug/releases/tag/pug%403.0.1 https://github.com/pugjs/pug/security/advisories/GHSA-p493-635q-r6gr https://github.com/pugjs/pug/issues/3312 https://github.com/pugjs/pug/commit/991e78f7c4220b2f8da042877c6f0ef5a4683be0 https://www.npmjs.com/package/pug https://www.npmjs.com/package/pug-code-gen

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.0