CVE-2023-44270

Aliases:GHSA-7fh5-64p2-3v2j
Advisory lineage Upstream: 0 Downstream: 4
Modified
Published: 29 Sept 2023, 00:00
Last modified:03 Nov 2025, 21:49

Vulnerability Summary

Overall Risk (default)
low
21/100
CVSS Score
5.3 MEDIUM
v3.1 (nvd)
EPSS Score
0.17% LOW
0% probability -0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

29 Sept 2023, 00:00
Published
Vulnerability first disclosed
03 Nov 2025, 21:49
Last Modified
Vulnerability information updated

Description

An issue was discovered in PostCSS before 8.4.31. The vulnerability affects linters using PostCSS to parse external untrusted CSS. An attacker can prepare CSS in such a way that it will contains parts parsed by PostCSS as a CSS comment. After processing by PostCSS, it will be included in the PostCSS output in CSS nodes (rules, properties) despite being included in a comment.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Trends

Current EPSS score: 0.17%• Percentile: 37%

Techniques & Countermeasures

  • CWE-74•Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

    The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Affected Systems

  • Npm•postcss

    < 8.4.31

  • postcss•postcss

    < 8.4.31

References (7)