Stored cross-site scripting in Quick PayPal Payments WordPress plugin
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The Quick PayPal Payments: Payment Button & Form plugin for WordPress is vulnerable in all versions up to and including 6.0.4. Insufficient input sanitization and output escaping of the 'form' shortcode attribute (CWE-79) let an authenticated attacker with contributor-level access or higher store arbitrary web scripts in pages. The script runs for every user who views the page, including editors and administrators who preview pending content.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Quick PayPal Payments: Payment Button & Form.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2026-110017
- 2026-10-16 CISA SSVC decision points changed
- 2026-10-16 Priority changed: MEDIUM → LOW
- 2026-10-16 Alias added: GHSA-q8wf-34g4-mm3w
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/203f850e-1eed-4c49-b733-4ac2ce9b6772?source=cve
- https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L1546
- https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L1554
- https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L603
- https://plugins.trac.wordpress.org/browser/quick-paypal-payments/tags/6.0.4/legacy/quick-paypal-payments.php#L826
- https://plugins.trac.wordpress.org/changeset/3746507
- https://plugins.trac.wordpress.org/changeset/3746507/quick-paypal-payments/trunk/legacy/quick-paypal-payments.php
More Fullworks vulnerabilities
- TI-2023-09326 Cross-site scripting in Quick Event Manager WordPress Plugin CVSS 3.1MEDIUM 6.1
- TI-2025-03831 Stop User Enumeration < 1.7.3 - Protection Bypass CVSS 3.1MEDIUM 5.3
- TI-2023-01466 Quick Paypal Payments < 5.7.26.4 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
- TI-2023-10990 WordPress Quick Paypal Payments plugin <= 5.7.25 - Broken Access Control vulnerability CVSS 3.1HIGH 7.5
- TI-2025-30007 WordPress Display Eventbrite Events plugin < 6.3 - Local File Inclusion Vulnerability CVSS 3.1HIGH 7.5
- TI-2023-10508 WordPress Quick Contact Form plugin <= 8.0.3.1 - Broken Access Control vulnerability CVSS 3.1MEDIUM 6.5
Sources
- CVE-2026-110017 · CVE Program
- CVE-2026-110017 · NVD
- FIRST EPSS
- GHSA-q8wf-34g4-mm3w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences