CVE-2023-2304: Favorites <= 2.3.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-31 · updated 2026-06-17
Weakness: CWE-79

Description

The Favorites plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'user_favorites' shortcode in versions up to, and including, 2.3.2 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

kylephillips Favorites: through 2.3.2

References

https://plugins.trac.wordpress.org/browser/favorites/tags/2.3.2/app/API/Shortcodes/UserFavoritesShortcode.php#L57
https://plugins.trac.wordpress.org/browser/favorites/tags/2.3.2/assets/js/favorites.js#L421
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=2919192%40favorites&old=2805323%40favorites&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/5bd03cd0-34f0-491c-8247-79656eba32a8?source=cve
https://plugins.trac.wordpress.org/browser/favorites/tags/2.3.2/app/API/Shortcodes/UserFavoritesShortcode.php#L57
https://plugins.trac.wordpress.org/browser/favorites/tags/2.3.2/assets/js/favorites.js#L421
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=2919192%40favorites&old=2805323%40favorites&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/5bd03cd0-34f0-491c-8247-79656eba32a8?source=cve

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