CVE-2024-4439

Name	CVE-2024-4439
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1069091

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
wordpress (PTS)	bullseye (security), bullseye	5.7.11+dfsg1-0+deb11u1	fixed
	bookworm, bookworm (security)	6.1.6+dfsg1-0+deb12u1	vulnerable
	sid, trixie	6.6.1+dfsg1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
wordpress	source	bullseye	(not affected)
wordpress	source	(unstable)	6.5.2+dfsg1-1			1069091

Notes

[bullseye] - wordpress <not-affected> (The vulnerable code was introduced later)
https://wpscan.com/blog/unauthenticated-stored-xss-fixed-in-wordpress-core/
https://wordpress.org/news/2024/04/wordpress-6-5-2-maintenance-and-security-release/
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://core.trac.wordpress.org/changeset/57951/branches/6.4/src/wp-includes/blocks/avatar.php