CVE-2025-3581

Newsletter < 8.8.5 - Admin+ Stored XSS via Widget

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

Newsletter

CVSS v3.1 CNA

4.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS

0.26% chance of exploitation in the next 30 days, 16th percentile

Published

2025-06-09

Updated

2025-06-10

Proof-of-concept exploits (1)

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

Security advisories

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

References

• CVE Record
• NVD entry