CVE-2021-29447

NameCVE-2021-29447
DescriptionWordpress 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2630-1, DSA-4896-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
wordpress (PTS)stretch4.7.5+dfsg-2+deb9u6vulnerable
stretch (security)4.7.21+dfsg-0+deb9u1fixed
buster5.0.12+dfsg1-0+deb10u1fixed
buster (security)5.0.14+dfsg1-0+deb10u1fixed
bullseye5.7.1+dfsg1-2fixed
bullseye (security)5.7.3+dfsg1-0+deb11u1fixed
bookworm, sid5.8.1+dfsg1-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
wordpresssourcestretch4.7.20+dfsg-1+deb9u1DLA-2630-1
wordpresssourcebuster5.0.12+dfsg1-0+deb10u1DSA-4896-1
wordpresssource(unstable)5.7.1+dfsg1-1unimportant

Notes

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

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