What is CVE-2026-110017?

CVE-2026-110017 is a medium-severity vulnerability in Fullworks Quick Paypal Payments: Payment Button & Form, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-10-16.

How severe is CVE-2026-110017?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Fullworks Quick Paypal Payments: Payment Button & Form

CVE-2026-110017

The Quick PayPal Payments: Payment Button & Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'form' parameter in all versions up to, and including, 6.0.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Because wp_kses_post strips only HTML tags, a quote-breaking payload containing no angle brackets survives post save intact, and the injected script fires for every viewer of the post — including higher-privileged Editors and Administrators who routinely preview a Contributor's pending content.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Fullworks Quick Paypal Payments: Payment Button & Form

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-110017?: CVE-2026-110017 is a medium-severity vulnerability in Fullworks Quick Paypal Payments: Payment Button & Form, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-10-16.
How severe is CVE-2026-110017?: Medium severity. CVSS v3 base score is 6.4 out of 10.