Unauthenticated Token Bypass in Email Subscribers & Newsletters Plugin by WordPress
CVE-2026-83555

Currently unrated

Key Information:

Vendor

WordPress
Status
Email Subscribers & Newsletters
Vendor
CVE Published:
23 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-83555?

The Email Subscribers & Newsletters plugin for WordPress lacks proper verification of management tokens per subscriber. This oversight allows unauthenticated users to manipulate subscription statuses, enabling actions such as forced unsubscriptions or confirmations for any known email address. Such vulnerabilities pose significant risks to user data integrity and subscription management, emphasizing the need for timely updates and security measures.

Affected Version(s)

Email Subscribers & Newsletters 0 < 5.9.35

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-2026-83555 - Proof of Concept

References

https://wpscan.com/vulnerability/54cb2a98-7860-40dd-817e-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Usama Arshad
WPScan
.