CVE-2026-19855

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

MEDIUM

6.5

CVSS Score

Published: September 9, 2026 at 06:25 AM UTC

Updated: September 9, 2026 at 05:27 PM UTC

1 product affected across 1 vendorAnti Spam

Using CleanTalk by Unknown?

Get instant alerts when new vulnerabilities affect CleanTalk - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM6.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Anti Spam · Cleantalkwordpress-plugin

60%

v < 6.87

Affected range stops below 6.87, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

ExploitVDB EntryTechnical Description

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMWPScan

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-74

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card