CVE-2018-19787

Publication date 2 December 2018

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.1 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
lxml 18.10 cosmic
Not affected
18.04 LTS bionic
Fixed 4.2.1-1ubuntu0.1
16.04 LTS xenial
Fixed 3.5.0-1ubuntu0.1
14.04 LTS trusty
Fixed 3.3.3-1ubuntu0.2

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
lxml

Severity score breakdown

Parameter Value
Base score 6.1 · Medium
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

References

Related Ubuntu Security Notices (USN)

Other references