GHSA-xp26-p53h-6h2p

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    GHSA-xp26-p53h-6h2p

    Published: 13 May 2022Last Modified: 20 Dec 2025

    Summary: Improper Neutralization of Input During Web Page Generation in LXML

    Details: An issue was discovered in lxml before 4.2.5. lxml/html/clean.py in the lxml.html.clean module does not remove javascript: URLs that use escaping, allowing a remote attacker to conduct XSS attacks, as demonstrated by "j a v a s c r i p t:" in Internet Explorer. This is a similar issue to CVE-2014-3146.

    References: https://nvd.nist.gov/vuln/detail/CVE-2018-19787, https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109, https://github.com/advisories/GHSA-xp26-p53h-6h2p, https://github.com/lxml/lxml, https://github.com/pypa/advisory-database/tree/main/vulns/lxml/PYSEC-2018-12.yaml, https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html, https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html, https://usn.ubuntu.com/3841-1, https://usn.ubuntu.com/3841-2

    Affected packages

    Package

    Name: lxml

    Purl: pkg:pypi/lxml

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.2.5

    Affected versions

    1.3.2
    1.3.3
    1.3.4
    1.3.5
    1.3.6

    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