USN-6483-1

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    USN-6483-1

    Published: 15 Nov 2023Last Modified: 27 Apr 2026

    Summary: tidy-html5 vulnerability

    Details: Neeraj Pal discovered that HTML Tidy incorrectly handled parsing certain HTML data. If a user or automated system were tricked into parsing specially crafted HTML data, a remote attacker could cause HTML Tidy to consume resources, leading to a denial of service, or possibly execute arbitrary code.

    References: https://ubuntu.com/security/notices/USN-6483-1, https://ubuntu.com/security/CVE-2021-33391

    Affected packages

    Package

    Name: tidy-html5

    Purl: pkg:deb/ubuntu/tidy-html5@2:5.6.0-11ubuntu0.20.04.1?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2:5.6.0-11ubuntu0.20.04.1

    Affected versions

    2:5.6.0-10
    2:5.6.0-11

    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
    USN-6483-1 | CVE-DB