Payment forms, Buy now buttons, and Invoicing System | GetPaid <= 2.8.61 - Unauthenticated Stored Cross-Site Scripting via 'mmdwqzpoxadd' Parameter
Summary
| CVE | CVE-2026-111110 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-17 08:16:28 UTC |
| Updated | 2026-10-17 08:16:28 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 7.2 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 7.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Stiofansisland | Payment Forms Buy Now Buttons And Invoicing System GetPaid | affected 2.8.61 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/changeset/3750463/invoicing/trunk/includes/admin/meta-boxes/c... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/payments/class-getpaid... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/payments/class-getpaid... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/class-wpinv-ajax.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/admin/meta-boxes/class... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/invoicing/tags/2.8.61/includes/payments/class-getpaid... | [email protected] | plugins.trac.wordpress.org | |
| github.com/AyeCode/invoicing/archive/refs/heads/master.zip | [email protected] | github.com | |
| www.wordfence.com/threat-intel/vulnerabilities/id/2161ecdc-d3c2-4ede-9c42-28f30... | [email protected] | www.wordfence.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: UKO (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-10-15T16:15:18.000Z | Vendor Notified |
| CNA | 2026-10-16T19:36:58.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.