CVE-2026-19855

Spam protection, Honeypot, Anti-Spam by CleanTalk < 6.87 - Unauthenticated Arbitrary Shortcode Execution via Comment Text

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

CleanTalk

CVSS v3.1 WPSCAN

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS

0.18% chance of exploitation in the next 30 days, 7th percentile

Published

2026-09-09

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/c27f3657-261a-46cd-860c-0bdf5c849190/

References

• CVE Record
• NVD entry