CVE-2026-19855

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

Published Sep 9, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-74
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Spam protection, Honeypot, Anti-Spam by CleanTalk < 6.87 - Unauthenticated Arbitrary Shortcode Execution via Comment Text
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Sep 9, 2026, 3:23 PM
Reserved
Aug 14, 2026, 9:43 AM
Status
Deferred
Published
Sep 9, 2026, 7:16 AM
Modified
Sep 9, 2026, 4:17 PM