CVE-2026-111110Payment forms, Buy now buttons, and Invoicing System | GetPaid <= 2.8.61 - Unauthenticated Stored Cross-Site Scripting via 'mmdwqzpoxadd' Parameter
Updated under an hour ago ()
Does this affect you?
It affects stiofansisland Payment forms, Buy now buttons, and Invoicing System | GetPaid. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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.
- CVSS
- 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 17, 2026
Affected products
stiofansisland Payment forms, Buy now buttons, and Invoicing System | GetPaid stiofansisland:payment_forms_buy_now_buttons_and_invoicing_system_getpaid (from the name) | through 2.8.61 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/2161ecdc-d3c2-4ede-9c42-28f30fa0f91e?source=cve
- https://plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/admin/meta-boxes/class-mb-payment-form.php#L30
- https://plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/payments/class-getpaid-checkout.php#L293
- https://plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/payments/class-getpaid-checkout.php#L402
- https://plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/payments/class-getpaid-payment-form-submission.php#L150
- https://plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/class-wpinv-ajax.php#L359
- https://github.com/AyeCode/invoicing/archive/refs/heads/master.zip
- https://plugins.trac.wordpress.org/changeset/3750463/invoicing/trunk/includes/admin/meta-boxes/class-mb-payment-form.php
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.