CVE-2021-29447

Name	CVE-2021-29447
Description	Wordpress is an open source CMS. A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks. This requires WordPress installation to be using PHP 8. Access to internal files is possible in a successful XXE attack. This has been patched in WordPress version 5.7.1, along with the older affected versions via a minor release. We strongly recommend you keep auto-updates enabled.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2630-1, DSA-4896-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
wordpress (PTS)	buster	5.0.15+dfsg1-0+deb10u1	fixed
	buster (security)	5.0.21+dfsg1-0+deb10u1	fixed
	bullseye (security), bullseye	5.7.8+dfsg1-0+deb11u2	fixed
	bookworm	6.1.1+dfsg1-1	fixed
	trixie	6.5+dfsg1-1	fixed
	sid	6.5.2+dfsg1-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
wordpress	source	stretch	4.7.20+dfsg-1+deb9u1		DLA-2630-1
wordpress	source	buster	5.0.12+dfsg1-0+deb10u1		DSA-4896-1
wordpress	source	(unstable)	5.7.1+dfsg1-1	unimportant

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh
Only an issue when installation runs under PHP8.