CVE-2023-43643

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    CVE-2023-43643

    Published: 9 Oct 2023Last Modified: 12 Aug 2026

    Summary: mXSS in AntiSamy

    Details: AntiSamy is a library for performing fast, configurable cleansing of HTML coming from untrusted sources. Prior to version 1.7.4, there is a potential for a mutation XSS (mXSS) vulnerability in AntiSamy caused by flawed parsing of the HTML being sanitized. To be subject to this vulnerability the `preserveComments` directive must be enabled in your policy file and also allow for certain tags at the same time. As a result, certain crafty inputs can result in elements in comment tags being interpreted as executable when using AntiSamy's sanitized output. This issue has been patched in AntiSamy 1.7.4 and later.

    References: https://github.com/nahsra/antisamy/releases/tag/v1.7.4, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/43xxx/CVE-2023-43643.json, https://github.com/nahsra/antisamy/security/advisories/GHSA-pcf2-gh6g-h5r2, https://nvd.nist.gov/vuln/detail/CVE-2023-43643

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -45c78f1b4de6e30ce18a7338fd6d200d60be1a05

    Affected versions

    v1.7.3
    v1.7.2
    v1.7.1
    v1.7.0

    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-2023-43643 | CVE-DB