CVE-2018-19787

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    CVE-2018-19787

    Published: 2 Dec 2018Last Modified: 8 Jul 2026

    Summary:

    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://lists.debian.org/debian-lts-announce/2020/11/msg00044.html, https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html, https://usn.ubuntu.com/3841-1/, https://usn.ubuntu.com/3841-2/, https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -1dee355e83b1f524de7a772a8da941a186036bc2

    Affected versions

    lxml-4.2.4
    lxml-4.2.3-win
    lxml-4.2.3
    lxml-4.2.2
    lxml-4.2.1
    lxml-4.2.0

    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