Stored Cross-Site Scripting in Newsletter WordPress Plugin by Newsletter
CVE-2025-3584

4.8MEDIUM

Key Information:

Vendor

WordPress
Status
Newsletter
Vendor
CVE Published:
3 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-3584?

The Newsletter plugin for WordPress prior to version 8.8.2 has a critical vulnerability that fails to adequately sanitize and escape certain Subscription settings. This oversight allows high privilege users, such as administrators, to execute Stored Cross-Site Scripting attacks. Such vulnerabilities can be particularly dangerous in multisite configurations where the unfiltered_html capability is restricted, posing significant risks to website security.

Affected Version(s)

Newsletter 0 < 8.8.2

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-2025-3584 - Proof of Concept

References

https://wpscan.com/vulnerability/76937bdd-7ffa-4b5e-ade1-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dmitrii Ignatyev
WPScan
.
CVE-2025-3584 : Stored Cross-Site Scripting in Newsletter WordPress Plugin by Newsletter