Bug 1793615 (CVE-2019-20042)

Summary:	CVE-2019-20042 wordpress: XSS through wp_targeted_link_rel
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	fedora, kevin
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:	2021-10-28 05:23:10 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:	1793616, 1793617
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2020-01-21 17:01:48 UTC

In wp-includes/formatting.php in WordPress 3.7 to 5.3.0, the function wp_targeted_link_rel() can be used in a particular way to result in a stored cross-site scripting (XSS) vulnerability. This has been patched in WordPress 5.3.1, along with all the previous WordPress versions from 3.7 to 5.3 via a minor release.

References:
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-xvg2-m2f4-83m7
https://hackerone.com/reports/509930

Upstream commit:
https://github.com/WordPress/wordpress-develop/commit/1f7f3f1f59567e2504f0fbebd51ccf004b3ccb1d

Comment 1 Guilherme de Almeida Suckevicz 2020-01-21 17:02:55 UTC

Created wordpress tracking bugs for this issue:

Affects: epel-6 [bug 1793616]
Affects: epel-7 [bug 1793617]