Stored Cross-Site Scripting in Newsletter WordPress Plugin by WordPress
CVE-2025-3581
Key Information:
- Vendor
WordPress
- Status
- Vendor
- CVE Published:
- 9 June 2025
Badges
What is CVE-2025-3581?
The Newsletter plugin for WordPress, prior to version 8.8.5, suffers from a vulnerability that allows stored cross-site scripting (XSS) attacks. This is due to a lack of validation and escaping of various Widget options before they are rendered on a page or post. Consequently, users with high privileges, like administrators, may inadvertently inject malicious scripts, even in configurations where the unfiltered_html capability is restricted, such as in multisite environments. Mitigation steps include upgrading to the latest version and ensuring best practices for user permissions.
Affected Version(s)
Newsletter 0 < 8.8.5
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.