Spam protection, Anti-Spam, FireWall by CleanTalk, CVE-2026-19855

CVE, Research URL: CVE-2026-19855
Home page URL: Security reports for Spam protection, Anti-Spam, FireWall by CleanTalk
Application: Spam protection, Anti-Spam, FireWall by CleanTalk
Published on: Sep 09, 2026
Research Description: The CleanTalk WordPress plugin before 6.87 does not prevent unauthenticated, user-supplied comment content from being passed to WordPress's shortcode engine, allowing any visitor to have arbitrary shortcodes registered on the site executed server-side and rendered to every subsequent visitor of the page.
Affected versions: max 6.87.
Status: vulnerable