CVE-2026-111110 stiofansisland CVE debrief

Who should care

Administrators and security teams responsible for WordPress installations with the GetPaid plugin should assess exposure and prioritize updates to prevent potential XSS attacks. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should also plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Why it matters

CVE-2026-111110 is a Stored Cross-Site Scripting vulnerability in the GetPaid plugin for WordPress, allowing unauthenticated attackers to inject arbitrary web scripts. Administrators and security teams should prioritize verifying and updating the plugin to prevent potential XSS attacks.

• Potential for unauthenticated attackers to inject arbitrary web scripts
• Possible execution of injected scripts when an administrator views the affected invoice's Payment Form Details metabox
• Required nonce (getpaid_form_nonce) is publicly emitted, making exploitation easier

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 vulnerability has a CVSS score of 7.2 and is considered HIGH severity. Administrators and security teams should prioritize verifying and updating the GetPaid plugin to prevent potential XSS attacks.

Defensive priority

Administrators and security teams should prioritize verifying and updating the GetPaid plugin to prevent potential XSS attacks.

Recommended defensive actions

• Verify and update the GetPaid plugin to the latest version
• Review and sanitize user input data
• Monitor for potential XSS attacks
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 7.2 and the affected plugin versions. The vulnerability is a Stored Cross-Site Scripting vulnerability in the GetPaid plugin for WordPress. The required nonce (getpaid_form_nonce) is publicly emitted, making exploitation easier. Defenders should verify the affected scope, severity, and vendor guidance.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.