Stored Cross-Site Scripting in Newsletter Plugin by WordPress
CVE-2025-3583

4.8MEDIUM

Key Information:

Vendor

WordPress
Status
Newsletter
Vendor
CVE Published:
5 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-3583?

The Newsletter plugin for WordPress, prior to version 8.7.1, is prone to a stored Cross-Site Scripting (XSS) vulnerability due to improper sanitization and escaping of certain settings. This flaw enables high privilege users, such as administrators, to execute malicious scripts, even in environments where the unfiltered_html capability is restricted, like multisite installations. If exploited, attackers could leverage this vulnerability to inject harmful scripts, potentially compromising sensitive data or user sessions.

Affected Version(s)

Newsletter 0 < 8.7.1

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-2025-3583 - Proof of Concept

References

https://wpscan.com/vulnerability/a6582e14-e21e-48e7-9b4c-...
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
.