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Vulnerabilities

Vulnerability · CVE-2026-111110

Payment forms, Buy now buttons, and Invoicing System | GetPaid <= 2.8.61 - Unauthenticated Stored Cross-Site Scripting via 'mmdwqzpoxadd' Parameter

Published Oct 16, 2026 · catalog updated Oct 18, 2026 · Payment forms, Buy now buttons, and Invoicing System | GetPaid

Check if you run it

No confirmed exploitation is on record for CVE-2026-111110. EPSS is 0.28%. Act only if a listed version of Payment forms, Buy now buttons, and Invoicing System | GetPaid is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.28%
Remediation
Version ranges on file
Affected products
stated Payment forms, Buy now buttons, and Invoicing System | GetPaid · vendor stiofansisland Payment forms, Buy now buttons, and Invoicing System | GetPaid · wordpress invoicing

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated Payment forms, Buy now buttons, and Invoicing System | GetPaid<= 2.8.61
  • vendor stiofansisland Payment forms, Buy now buttons, and Invoicing System | GetPaidversion unspecified
  • wordpress invoicingversion unspecified

How to fix CVE-2026-111110

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-111110. EPSS is 0.28%. Act only if a listed version of Payment forms, Buy now buttons, and Invoicing System | GetPaid is installed.

Which versions are affected?

Compare what you have installed with Payment forms, Buy now buttons, and Invoicing System | GetPaid <= 2.8.61. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.28%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 16, 2026 · Wordfence Intelligence

    Detected

    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 a

  2. Oct 17, 2026 · CVE.org

    Updated

    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 a

  3. Oct 17, 2026 · NIST NVD

    Updated

    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 a

  4. Oct 18, 2026 · NIST NVD

    Updated

    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 a

Sources

  • CVE.orgVulnerability recordCVE-2026-111110

    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 make

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-111110

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-111110

    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 make

    nvd.nist.gov
  • Tenable CVE DatabaseVulnerability recordCVE-2026-111110

    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 a

    tenable.com
  • Wordfence IntelligencePackage advisoryCVE-2026-111110

    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 make

    wordfence.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.