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CVE-2026-111110: Payment forms, Buy now buttons, and Invoicing System | GetPaid

Severity

7.2 (HIGH)

Vendor

STIOFANSISLAND

Affected versions

0 through 2.8.61

Patch status

Unknown

Published

2026-10-17T08:16:28.310

Modified

2026-10-17T08:16:28.310

Why it matters

This matters because the affected product may be exposed on public websites. A vulnerable plugin can create a direct path to site compromise, malicious code deployment, or data theft.

Recommended admin actions

• Review and patch based on exposure, asset criticality, and business impact.
• Check whether the affected WordPress plugin or theme is installed.
• Update, disable, or remove the affected component if present.
• Treat internet-facing systems as higher priority.
• Review logs for suspicious activity related to the affected application or component.

Technical summary

The Payment forms, Buy now buttons, and Invoicing System | GetPaid plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'mmdwqzpoxadd' parameter in all versions up to, and including, 2.8.61 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The required nonce (getpaid_form_nonce) is publicly emitted to all visitors via wp_localize_script as WPInv.formNonce, meaning no authentication or prior nonce leak is needed; the stored payload fires when an administrator views the affected invoice's Payment Form Details metabox.

View the official NVD record for CVE-2026-111110

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.