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Gentoo Linux: CVE-2021-28957: lxml: Multiple Vulnerabilities

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Gentoo Linux: CVE-2021-28957: lxml: Multiple Vulnerabilities

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
03/21/2021
Created
08/29/2022
Added
08/11/2022
Modified
08/11/2022

Description

An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the safe_attrs_only and forms arguments, the Cleaner class does not remove the formaction attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.

Solution(s)

  • gentoo-linux-upgrade-dev-python-lxml

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