XSS in Thenewsletterplugin Newsletter
CVE-2025-3583
The Newsletter WordPress plugin before 8.7.1 does not sanitise and escape some of its settings, 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).
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Thenewsletterplugin Newsletter
- Newsletter — versions 0
Weakness classification (CWE)
References
- wpscan.com/vulnerability/a6582e14-e21e-48e7-9b4c-0044fb199825/ (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2025-3583?
- CVE-2025-3583 is a medium-severity vulnerability in Thenewsletterplugin Newsletter, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2025-05-05.
- How severe is CVE-2025-3583?
- Medium severity. CVSS v3 base score is 4.8 out of 10.