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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00201.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L1546 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L1554 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L603 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L826 cve-icon cve-icon
https://plugins.trac.wordpress.org/changeset/3746507 cve-icon cve-icon
https://plugins.trac.wordpress.org/changeset/3746507/quick-paypal-payments/trunk/legacy/quick-paypal-payments.php cve-icon cve-icon
https://www.wordfence.com/threat-intel/vulnerabilities/id/203f850e-1eed-4c49-b733-4ac2ce9b6772?source=cve cve-icon cve-icon
History

Fri, 16 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 16 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
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.
Title Quick PayPal Payments: Payment Button & Form <= 6.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'form' Shortcode Attribute
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-10-16T14:39:04.958Z

Reserved: 2026-10-13T14:56:28.128Z

Link: CVE-2026-110017

cve-icon Vulnrichment

Updated: 2026-10-16T14:34:40.606Z

cve-icon NVD

Status : Deferred

Published: 2026-10-16T06:17:08.810

Modified: 2026-10-16T15:17:09.230

Link: CVE-2026-110017

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T14:45:13Z

Weaknesses