GitHub Advisoryadvisory · PyPI

GHSA-xp26-p53h-6h2p Improper Neutralization of Input During Web Page Generation in LXML

MEDIUM Published 2022-05-13 Modified 2025-12-20 Official page ↗
Aliases
CVE-2018-19787
Ecosystem
PyPI
Packages
lxml
Severity
Moderate
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weaknesses
CWE-79
Reviewed
2022-06-28

Affected packages

• PyPI lxml: < 4.2.5 → fixed in 4.2.5

Description

An issue was discovered in lxml before 4.2.5. lxml/html/clean.py in the lxml.html.clean module does not remove javascript: URLs that use escaping, allowing a remote attacker to conduct XSS attacks, as demonstrated by "j a v a s c r i p t:" in Internet Explorer. This is a similar issue to CVE-2014-3146.

Related

Alias · CVE (1)

  • CVE-2018-19787 An issue was discovered in lxml before 4.2.5. vulnerability

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References