Embedded malicious code (backdoor) in eslint-config-prettier - CVE-2025-54313
Published: July 23, 2025
Vulnerability identifier: #VU113168
CSH Severity: Critical
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:A/U:Red
CVE-ID: CVE-2025-54313
CWE-ID: CWE-506
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Prettier
Affected software:
eslint-config-prettier
eslint-config-prettier
Detailed vulnerability description
The vulnerability allows a remote attacker to gain unauthorized access to the application.
The vulnerability exists due to presence of embedded malicious code in the application caused by maintainer account compromise on July 18. A remote attacker can compromise the affected system.
Reportedly the issue affects Microsoft Windows installations only.
How to mitigate CVE-2025-54313
If you are using one of the affected versions, you need to perform investigation into this security incident to assess damage done by malicious activity.
Sources
- https://github.com/community-scripts/ProxmoxVE/discussions/6115
- https://github.com/prettier/eslint-config-prettier/issues/339
- https://news.ycombinator.com/item?id=44608811
- https://news.ycombinator.com/item?id=44609732
- https://socket.dev/blog/npm-phishing-campaign-leads-to-prettier-tooling-packages-compromise
- https://www.bleepingcomputer.com/news/security/popular-npm-linter-packages-hijacked-via-phishing-to-drop-malware/
- https://www.endorlabs.com/learn/cve-2025-54313-eslint-config-prettier-compromise----high-severity-but-windows-only
- https://www.npmjs.com/package/eslint-config-prettier?activeTab=versions
- https://www.stepsecurity.io/blog/supply-chain-security-alert-eslint-config-prettier-package-shows-signs-of-compromise