medium
6.1
CWE
79
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2020-27783: XSS

First published: Sun Oct 18 2020(Updated: )

A Cross-site Scripting (XSS) vulnerability was found in the python-lxml's clean module. The module's parser did not properly imitate browsers, causing different behaviors between the sanitizer and the user's page. This flaw allows a remote attacker to run arbitrary HTML/JS code. The highest threat from this vulnerability is to confidentiality and integrity.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
pip/lxml<4.6.2
4.6.2
redhat/python-lxml<0:4.2.3-2.el8
0:4.2.3-2.el8
redhat/rh-python38-babel<0:2.7.0-12.el7
0:2.7.0-12.el7
redhat/rh-python38-python<0:3.8.11-2.el7
0:3.8.11-2.el7
redhat/rh-python38-python-cryptography<0:2.8-5.el7
0:2.8-5.el7
redhat/rh-python38-python-jinja2<0:2.10.3-6.el7
0:2.10.3-6.el7
redhat/rh-python38-python-lxml<0:4.4.1-7.el7
0:4.4.1-7.el7
redhat/rh-python38-python-pip<0:19.3.1-2.el7
0:19.3.1-2.el7
redhat/rh-python38-python-urllib3<0:1.25.7-7.el7
0:1.25.7-7.el7
Lxml Lxml>=1.2<4.6.2
Redhat Software Collections
Redhat Enterprise Linux=8.0
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Fedoraproject Fedora=32
Fedoraproject Fedora=33
Netapp Snapcenter
Oracle Communications Offline Mediation Controller=12.0.0.3.0
Oracle ZFS Storage Appliance Kit=8.8
debian/lxml
4.3.2-1+deb10u4
4.6.3+dfsg-0.1+deb11u1
4.9.2-1
4.9.3-1
redhat/lxml<4.6.2
4.6.2
IBM QRadar SIEM<=7.5 - 7.5.0 UP8 IF01

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1901633

Remedy

https://www.oracle.com//security-alerts/cpujul2021.html

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-27783?

    CVE-2020-27783 is a Cross-site Scripting (XSS) vulnerability found in the python-lxml's clean module.

  • How does CVE-2020-27783 work?

    CVE-2020-27783 allows a remote attacker to run arbitrary HTML/JS code by exploiting the improper imitation of browsers in the module's parser.

  • What is the severity of CVE-2020-27783?

    The severity of CVE-2020-27783 is medium with a CVSS score of 6.1.

  • Which software packages are affected by CVE-2020-27783?

    The python-lxml package version 0:4.2.3-2.el8 and the following rh-python38 packages are affected: rh-python38-babel, rh-python38-python, rh-python38-python-cryptography, rh-python38-python-jinja2, rh-python38-python-lxml, rh-python38-python-pip, rh-python38-python-urllib3.

  • How can I fix CVE-2020-27783?

    To fix CVE-2020-27783, upgrade the python-lxml package to version 4.6.2 or higher and ensure the affected rh-python38 packages are updated to the fixed versions provided by Red Hat.

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