p PatchFirst

CVE-2021-43818

CVE-2021-43818 · HTML Cleaner allows crafted and SVG embedded scripts to pass through

This page contains facts from public vulnerability sources. Check the original advisory before updating.

lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available.

CVSS 8.2 · High · EPSS 2.7% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • lxml

    Versions
    • < 4.6.5: Affected

    No fix published

  • lxml Debian:12

    Affected ranges
    • ECOSYSTEM: < 4.7.1-1

    Update to 4.7.1-1

  • lxml Debian:13

    Affected ranges
    • ECOSYSTEM: < 4.7.1-1

    Update to 4.7.1-1

  • lxml Debian:14

    Affected ranges
    • ECOSYSTEM: < 4.7.1-1

    Update to 4.7.1-1

  • lxml PyPI

    Versions
    • 1.3.2
    • 1.3.3
    • 1.3.4
    • 1.3.5
    • 1.3.6
    • 2.0
    • 2.0.10
    • 2.0.11
    • 2.0.4
    • 2.0.5
    • 2.0.6
    • 2.0.7
    • 2.0.8
    • 2.0.9
    • 2.1
    • 2.1.1
    • 2.1.2
    • 2.1.3
    • 2.1.4
    • 2.1.5
    • 2.2
    • 2.2.1
    • 2.2.2
    • 2.2.3
    • 2.2.4
    • 2.2.5
    • 2.2.6
    • 2.2.7
    • 2.2.8
    • 2.3
    • 2.3.1
    • 2.3.2
    • 2.3.3
    • 2.3.4
    • 2.3.5
    • 2.3.6
    • 3.0
    • 3.0.2
    • 3.1.0
    • 3.1.1
    • 3.1.2
    • 3.2.0
    • 3.2.1
    • 3.2.2
    • 3.2.3
    • 3.2.4
    • 3.2.5
    • 3.3.0
    • 3.3.1
    • 3.3.2
    • 3.3.3
    • 3.3.4
    • 3.3.5
    • 3.3.6
    • 3.4.0
    • 3.4.1
    • 3.4.2
    • 3.4.3
    • 3.4.4
    • 3.5.0
    • 3.6.0
    • 3.6.1
    • 3.6.2
    • 3.6.3
    • 3.6.4
    • 3.7.0
    • 3.7.1
    • 3.7.2
    • 3.7.3
    • 3.8.0
    • 4.0.0
    • 4.1.0
    • 4.1.1
    • 4.2.0
    • 4.2.1
    • 4.2.2
    • 4.2.3
    • 4.2.4
    • 4.2.5
    • 4.2.6
    • 4.3.0
    • 4.3.2
    • 4.3.3
    • 4.3.4
    • 4.3.5
    • 4.4.0
    • 4.4.1
    • 4.4.2
    • 4.4.3
    • 4.5.0
    • 4.5.1
    • 4.5.2
    • 4.6.0
    • 4.6.1
    • 4.6.2
    • 4.6.3
    • 4.6.4
    Affected ranges
    • ECOSYSTEM: < 4.6.5

    Update to 4.6.5

  • lxml PyPI

    Versions
    • 0.9
    • 0.9.1
    • 0.9.2
    • 1.0
    • 1.0.1
    • 1.0.2
    • 1.0.3
    • 1.0.4
    • 1.0.beta
    • 1.1
    • 1.1.1
    • 1.1.2
    • 1.1alpha
    • 1.1beta
    • 1.2
    • 1.2.1
    • 1.3
    • 1.3.1
    • 1.3.2
    • 1.3.3
    • 1.3.4
    • 1.3.5
    • 1.3.6
    • 1.3beta
    • 2.0
    • 2.0.1
    • 2.0.10
    • 2.0.11
    • 2.0.2
    • 2.0.3
    • 2.0.4
    • 2.0.5
    • 2.0.6
    • 2.0.7
    • 2.0.8
    • 2.0.9
    • 2.0alpha1
    • 2.0alpha2
    • 2.0alpha3
    • 2.0alpha4
    • 2.0alpha5
    • 2.0alpha6
    • 2.0beta1
    • 2.0beta2
    • 2.1
    • 2.1.1
    • 2.1.2
    • 2.1.3
    • 2.1.4
    • 2.1.5
    • 2.1alpha1
    • 2.1beta1
    • 2.1beta2
    • 2.1beta3
    • 2.2
    • 2.2.1
    • 2.2.2
    • 2.2.3
    • 2.2.4
    • 2.2.5
    • 2.2.6
    • 2.2.7
    • 2.2.8
    • 2.2alpha1
    • 2.2beta1
    • 2.2beta2
    • 2.2beta3
    • 2.2beta4
    • 2.3
    • 2.3.1
    • 2.3.2
    • 2.3.3
    • 2.3.4
    • 2.3.5
    • 2.3.6
    • 2.3alpha1
    • 2.3alpha2
    • 2.3beta1
    • 3.0
    • 3.0.1
    • 3.0.2
    • 3.1.0
    • 3.1.1
    • 3.1.2
    • 3.1beta1
    • 3.2.0
    • 3.2.1
    • 3.2.2
    • 3.2.3
    • 3.2.4
    • 3.2.5
    • 3.3.0
    • 3.3.0beta1
    • 3.3.0beta2
    • 3.3.0beta3
    • 3.3.0beta4
    • 3.3.0beta5
    • 3.3.1
    • 3.3.2
    • 3.3.3
    • 3.3.4
    • 3.3.5
    • 3.3.6
    • 3.4.0
    • 3.4.1
    • 3.4.2
    • 3.4.3
    • 3.4.4
    • 3.5.0
    • 3.5.0b1
    • 3.6.0
    • 3.6.1
    • 3.6.2
    • 3.6.3
    • 3.6.4
    • 3.7.0
    • 3.7.1
    • 3.7.2
    • 3.7.3
    • 3.8.0
    • 4.0.0
    • 4.1.0
    • 4.1.1
    • 4.2.0
    • 4.2.1
    • 4.2.2
    • 4.2.3
    • 4.2.4
    • 4.2.5
    • 4.2.6
    • 4.3.0
    • 4.3.1
    • 4.3.2
    • 4.3.3
    • 4.3.4
    • 4.3.5
    • 4.4.0
    • 4.4.1
    • 4.4.2
    • 4.4.3
    • 4.5.0
    • 4.5.1
    • 4.5.2
    • 4.6.0
    • 4.6.1
    • 4.6.2
    • 4.6.3
    • 4.6.4
    Affected ranges
    • {"events": [{"introduced": "0"}, {"fixed": "f2330237440df7e8f39c3ad1b1aa8852be3b27c0"}, {"fixed": "12fa9669007180a7bb87d990c375cf91ca5b664a"}], "repo": "https://github.com/lxml/lxml", "type": "GIT"}
    • GIT: < a3eacbc0dcf1de1c822ec29fb7d090a4b1712a9c
    • ECOSYSTEM: < 4.6.5

    Update to 4.6.5

  • lxml Ubuntu:Pro:14.04:LTS

    Versions
    • 3.2.0-1
    • 3.3.0~beta2-1
    • 3.3.0~beta4-1
    • 3.3.1-1
    • 3.3.2-1
    • 3.3.2-1build1
    • 3.3.3-1
    • 3.3.3-1ubuntu0.1
    • 3.3.3-1ubuntu0.2
    • 3.3.3-1ubuntu0.2+esm1
    • 3.3.3-1ubuntu0.2+esm2
    • 3.3.3-1ubuntu0.2+esm3
    Affected ranges
    • ECOSYSTEM: < 3.3.3-1ubuntu0.2+esm5

    Update to 3.3.3-1ubuntu0.2+esm5

  • lxml Ubuntu:Pro:16.04:LTS

    Versions
    • 3.4.4-1
    • 3.5.0-1
    • 3.5.0-1build1
    • 3.5.0-1ubuntu0.1
    • 3.5.0-1ubuntu0.2
    • 3.5.0-1ubuntu0.3
    • 3.5.0-1ubuntu0.4
    Affected ranges
    • ECOSYSTEM: < 3.5.0-1ubuntu0.4+esm2

    Update to 3.5.0-1ubuntu0.4+esm2

  • lxml Ubuntu:18.04:LTS

    Versions
    • 4.0.0-1
    • 4.1.0-1
    • 4.2.0-1
    • 4.2.1-1
    • 4.2.1-1ubuntu0.1
    • 4.2.1-1ubuntu0.2
    • 4.2.1-1ubuntu0.3
    • 4.2.1-1ubuntu0.4
    Affected ranges
    • ECOSYSTEM: < 4.2.1-1ubuntu0.6

    Update to 4.2.1-1ubuntu0.6

  • lxml Ubuntu:20.04:LTS

    Versions
    • 4.4.1-1
    • 4.4.1-1build1
    • 4.4.2-1
    • 4.5.0-1
    • 4.5.0-1ubuntu0.1
    • 4.5.0-1ubuntu0.2
    • 4.5.0-1ubuntu0.3
    Affected ranges
    • ECOSYSTEM: < 4.5.0-1ubuntu0.5

    Update to 4.5.0-1ubuntu0.5

  • lxml Ubuntu:22.04:LTS

    Versions
    • 4.6.3+dfsg-0.1
    • 4.6.4-1
    • 4.6.4-1ubuntu1
    Affected ranges
    • ECOSYSTEM: < 4.7.1-1

    Update to 4.7.1-1

Original sources

Check your server →