CVSS 3.1 Score 5.3 of 10 (medium)


Published Sep 29, 2023
Updated: Oct 10, 2023


CVE-2023-44270 is a vulnerability discovered in PostCSS before version 8.4.31, affecting linters that use PostCSS to parse external untrusted CSS. This vulnerability allows an attacker to manipulate CSS in a way that parts of it are parsed as a CSS comment by PostCSS, but still included in the output as CSS rules or properties. The vulnerability has a risk score of 25 and a base severity of MEDIUM. It requires no privileges and no user interaction, with the attack vector being through the network. The potential impact includes low integrity impact and no confidentiality impact. The vulnerability falls under CWE-74, which refers to improper neutralization of special elements in output used by a downstream component (injection).

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