CVE-2023-44270

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    CVE-2023-44270

    Published: 29 Sept 2023Last Modified: 6 Oct 2026

    Summary:

    Details: 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.

    References: https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25, https://github.com/postcss/postcss/releases/tag/8.4.31, https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/44xxx/CVE-2023-44270.json, https://nvd.nist.gov/vuln/detail/CVE-2023-44270, https://github.com/github/advisory-database/issues/2820, https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -90208de8805dd762596c0028b8637ffbed23e371

    Affected versions

    8.4.30
    8.4.29
    8.4.28
    8.4.27
    8.4.26
    8.4.25
    8.4.24
    8.4.23
    8.4.22
    8.4.21
    8.4.20
    8.4.19
    8.4.18
    8.4.17
    8.4.16
    8.4.15
    8.4.14
    8.4.13
    8.4.12
    8.4.11
    8.4.10
    8.4.9
    8.4.8
    8.4.7
    8.4.6
    8.4.5
    8.4.0
    8.4.4
    8.4.3
    8.4.2
    8.4.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2023-44270 | CVE-DB