Arbitrary Web Script Injection Vulnerability in CleanTalk Anti-Spam Plugin
CVE-2026-8071

8.8HIGH

Key Information:

Vendor

WordPress
Status
Anti-spam By Cleantalk. Spam Protection
Vendor
CVE Published:
10 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8071?

The Anti-Spam by CleanTalk plugin for WordPress prior to version 6.79 features a vulnerability where it fails to properly sanitize user input within its email-encoding functionality. This oversight allows unauthenticated attackers to inject malicious web scripts into comments that are approved. When any user, including those with administrative privileges, views these comments, the injected scripts can execute, posing serious risks to site security and integrity.

Affected Version(s)

Anti-Spam by CleanTalk. Spam protection 0 < 6.79

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-8071 - Proof of Concept

References

https://wpscan.com/vulnerability/0d4635b5-2d79-4337-a1ad-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Matthew Rollings
WPScan
.