What’s Vulnerable › Vulnerabilities
CVE-2026-19855: Spam protection, Honeypot, Anti-Spam by CleanTalk < 6.87 - Unauthenticated Arbitrary Shortcode Execution via Comment Text
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-09 · updated 2026-09-09
- Weakness: CWE-74
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 products
- CleanTalk: before 6.87 — fixed in 6.87
How to fix
Upgrade to a fixed version: CleanTalk 6.87. Check the vendor advisory for mitigations.
References
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