Bug 1830999 (CVE-2020-11888)

Summary:	CVE-2020-11888 python-markdown2: Unsanitized input allows for cross-site scripting (XSS)
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	thomas.moschny
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-04 16:31:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1831000, 1831001
Bug Blocks:

Description Michael Kaplan 2020-05-04 13:22:23 UTC

An issue was discovered in python-markdown2 through 2.3.8 allows XSS because element names are mishandled unless a \w+ match succeeds. For example, an attack might use elementname@ or elementname- with an onclick attribute.

Upstream Issue:

https://github.com/trentm/python-markdown2/issues/348

Comment 1 Michael Kaplan 2020-05-04 13:22:39 UTC

Created python-markdown2 tracking bugs for this issue:

Affects: epel-all [bug 1831001]
Affects: fedora-all [bug 1831000]

Comment 2 Product Security DevOps Team 2020-05-04 16:31:57 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.