Updated python-lxml packages fix a security vulnerability
Publication date: 13 Jun 2021Modification date: 13 Jun 2021
Type: security
Affected Mageia releases : 7 , 8
CVE: CVE-2021-28957
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 (CVE-2021-28957).
References
- https://bugs.mageia.org/show_bug.cgi?id=28983
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/
- https://www.debian.org/security/2021/dsa-4880
- https://ubuntu.com/security/notices/USN-4896-1
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28957
SRPMS
8/core
- python-lxml-4.6.3-1.mga8
7/core
- python-lxml-4.3.0-1.3.mga7