CVE-2026-111110 json
Payment forms, Buy now buttons, and Invoicing System | GetPaid <= 2.8.61 - Unauthenticated Stored Cross-Site Scripting via 'mmdwqzpoxadd' Parameter
published 2026-10-17 22 d ago modified 2026-10-19 20 d ago also EUVD-2026-103275
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 20%
- public exploits
- 0
- none known
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 21 d ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- stiofansisland Payment forms, Buy now buttons, and Invoicing System | GetPaid
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
- wordfence.com /threat-intel/vulnerabilities/id/2161ecdc-d3c2-4ede-9c42-28f30fa0f91e?source=cve
- plugins.trac.wordpress.org /browser/invoicing/tags/2.8.61/includes/admin/meta-boxes/class-mb-payment-form.php#L30
- plugins.trac.wordpress.org /browser/invoicing/tags/2.8.61/includes/payments/class-getpaid-checkout.php#L293
- plugins.trac.wordpress.org /browser/invoicing/tags/2.8.61/includes/payments/class-getpaid-checkout.php#L402
- plugins.trac.wordpress.org /browser/invoicing/tags/2.8.61/includes/payments/class-getpaid-payment-form-submission.php#L150
- plugins.trac.wordpress.org /browser/invoicing/tags/2.8.61/includes/class-wpinv-ajax.php#L359
- github.com /AyeCode/invoicing/archive/refs/heads/master.zip
- plugins.trac.wordpress.org /changeset/3750463/invoicing/trunk/includes/admin/meta-boxes/class-mb-payment-form.php
Sources
- CVE List CVE-2026-111110
- NVD CVE-2026-111110
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.