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CVE-2018-19787

Published: 2 December 2018

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.

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
lxml
Launchpad, Ubuntu, Debian
upstream
Released (4.2.5-1)
trusty
Released (3.3.3-1ubuntu0.2)
xenial
Released (3.5.0-1ubuntu0.1)
bionic
Released (4.2.1-1ubuntu0.1)
cosmic Not vulnerable
(4.2.5-1)
Patches:
upstream: https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N