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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-21353 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/pugjs/pug/commit/991e78f7c4220b2f8da042877c6f0ef5a4683be0 CVE, GitHub, Inc. Patch  Third Party Advisory 
https://github.com/pugjs/pug/issues/3312 CVE, GitHub, Inc. Exploit  Patch  Third Party Advisory 
https://github.com/pugjs/pug/pull/3314 CVE, GitHub, Inc. Patch  Third Party Advisory 
https://github.com/pugjs/pug/releases/tag/pug%403.0.1 CVE, GitHub, Inc. Release Notes  Third Party Advisory 
https://github.com/pugjs/pug/security/advisories/GHSA-p493-635q-r6gr CVE, GitHub, Inc. Third Party Advisory 
https://www.npmjs.com/package/pug CVE, GitHub, Inc. Product  Third Party Advisory 
https://www.npmjs.com/package/pug-code-gen CVE, GitHub, Inc. Product  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-94 Improper Control of Generation of Code ('Code Injection') cwe source acceptance level NIST  
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-21353
NVD Published Date:
03/02/2021
NVD Last Modified:
05/27/2025
Source:
GitHub, Inc.