ALSA-2021:4158

    Dashboard / Vulnerabilities / ALSA-2021:4158

    ALSA-2021:4158

    Published: 9 Nov 2021Last Modified: 4 Feb 2026

    Summary: Moderate: python-lxml security update

    Details: lxml is an XML processing library providing access to libxml2 and libxslt libraries using the Python ElementTree API. Security Fix(es): * python-lxml: Missing input sanitization for formaction HTML5 attributes may lead to XSS (CVE-2021-28957) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

    References: https://vulners.com/cve/CVE-2021-28957

    Affected packages

    Package

    Name: python3-lxml

    Purl: pkg:rpm/almalinux/python3-lxml

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.2.3-3.el8

    Affected versions

    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
    ALSA-2021:4158 | CVE-DB