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CVE-2026-19855

Medium

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.

SeverityMedium
CVSS6.5
Exploit probability—
ProductCleanTalk
PublishedSep 9, 2026
First seenSep 9, 2026
Weakness typeCWE-74Injection

How to fix

Update
  • CleanTalk6.87 or later

Affected products

ProductAffected versionsFixed in
CleanTalkv < 6.876.87

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