Code Injection in Pug - CVE-2021-21353
Published: March 8, 2021
Vulnerability identifier: #VU51267
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-21353
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Pugjs
Affected software:
Pug
Pug
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation in visitMixin and visitMixinBlock within the "pretty" option. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2021-21353
Install updates from vendor's website.
Sources
- https://github.com/pugjs/pug/commit/991e78f7c4220b2f8da042877c6f0ef5a4683be0
- https://github.com/pugjs/pug/issues/3312
- 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://www.npmjs.com/package/pug
- https://www.npmjs.com/package/pug-code-gen