Vulnerability · Published Jun 9, 2025 · Assigned by WPScan
CVE-2025-3581Newsletter < 8.8.5 - Admin+ Stored XSS via Widget
Medium 4.8
In plain English
A medium-severity security flaw in Newsletter from Unknown. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).
Severity (CVSS 3.1)4.8Medium
Exploit odds (30 days)0.3%top 80.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
The Newsletter WordPress plugin before 8.8.5 does not validate and escape some of its Widget options before outputting them back in a page/post where the block is embed, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Newsletter | 0 – before 8.8.5 |
References
- https://wpscan.com/vulnerability/2d96f018-510d-40ab-9e73-76fa44784813/ exploit, vdb-entry, technical-description