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CVE-2026-110017

MEDIUM 6.4 CVSS 3.1
Published
October 16, 2026
Last modified
October 16, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Description

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.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • fullworks Quick PayPal Payments: Payment Button & Form — Up to and including 6.0.4

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L1546
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L1554
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L603
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L826
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3746507
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3746507/quick-paypal-payments/trunk/legacy/quick-paypal-payments.php
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/203f850e-1eed-4c49-b733-4ac2ce9b6772?source=cve
  • nvd.nist.gov Official NVD record