Bug 2278924 (CVE-2024-4439)

Summary:	CVE-2024-4439 wordpress: stored cross-site scripting via user display names in the Avatar block
Product:	[Other] Security Response	Reporter:	Robb Gatica <rgatica>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
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Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	wordpress 6.5.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2278925, 2278926
Bug Blocks:

Description Robb Gatica 2024-05-03 18:29:33 UTC

WordPress Core is vulnerable to Stored Cross-Site Scripting via user display names in the Avatar block in various versions up to 6.5.2 due to insufficient output escaping on the display name. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. In addition, it also makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that have the comment block present and display the comment author's avatar.

https://core.trac.wordpress.org/changeset/57951/branches/6.4/src/wp-includes/blocks/avatar.php
https://core.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=57950%40%2F&new=57950%40%2F&sfp_email=&sfph_mail=#file3
https://wordpress.org/news/2024/04/wordpress-6-5-2-maintenance-and-security-release/
https://www.wordfence.com/blog/2024/04/unauthenticated-stored-cross-site-scripting-vulnerability-patched-in-wordpress-core/
https://www.wordfence.com/threat-intel/vulnerabilities/id/e363c09a-4381-4b3a-951c-9a0ff5669016?source=cve

Comment 1 Robb Gatica 2024-05-03 18:29:48 UTC

Created wordpress tracking bugs for this issue:

Affects: epel-all [bug 2278925]
Affects: fedora-all [bug 2278926]