MGASA-2021-0246

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2021-28957
Published: 13 Jun 2021, 21:32
Last modified:16 Apr 2026, 04:25

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 Jun 2021, 21:32
Published
Vulnerability first disclosed
16 Apr 2026, 04:25
Last Modified
Vulnerability information updated

Description

Updated python-lxml packages fix a security vulnerability 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).

Affected Systems

  • mageia•python-lxml

    < 4.3.0-1.3.mga7

  • mageia•python-lxml

    < 4.6.3-1.mga8

References (5)