lxml Cross-site Scripting Via Control Characters
Date: 2022-05
Affected: pip/lxml
Attack vector: xss
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2014-3146
CWE: CWE-79
CVSS: 6.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

Incomplete blacklist vulnerability in the `lxml.html.clean` module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the `clean_html` function.


Mitigations:

Architectural layers (MAESTRO):