CVE-2021-39202

NameCVE-2021-39202
DescriptionWordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. In affected versions the widgets editor introduced in WordPress 5.8 beta 1 has improper handling of HTML input in the Custom HTML feature. This leads to stored XSS in the custom HTML widget. This has been patched in WordPress 5.8. It was only present during the testing/beta phase of WordPress 5.8.
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)
NVD severitylow

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
wordpress (PTS)stretch4.7.5+dfsg-2+deb9u6fixed
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
wordpresssource(unstable)(not affected)

Notes

- wordpress <not-affected> (Vulnerable code introduced later)
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-fr6h-3855-j297

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