CVE-2025-3581 Information

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).

Reference

https://wpscan.com/vulnerability/2d96f018-510d-40ab-9e73-76fa44784813/