What is CVE-2023-3666?

CVE-2023-3666 is a low-severity vulnerability in Maevelander Sticky Side Buttons, classified under Cross-site Scripting. CVSS score: 3.3/10. Published 2025-09-03.

How severe is CVE-2023-3666?

Low severity. CVSS v3 base score is 3.3 out of 10.

XSS in Maevelander Sticky Side Buttons

CVE-2023-3666

The Sticky Side Buttons WordPress plugin before 2.0.0 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 2025-09-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (9.9th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Maevelander Sticky Side Buttons
Sticky Side Buttons — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

wpscan.com/vulnerability/c37f1708-c154-41dc-9079-3230827eed1b/ (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2023-3666?: CVE-2023-3666 is a low-severity vulnerability in Maevelander Sticky Side Buttons, classified under Cross-site Scripting. CVSS score: 3.3/10. Published 2025-09-03.
How severe is CVE-2023-3666?: Low severity. CVSS v3 base score is 3.3 out of 10.