CVE-2026-111110 Cross-site scripting in Payment forms, Buy now buttons, and Invoicing System | GetPaid
Unauthenticated attackers can inject arbitrary scripts via the mmdwqzpoxadd parameter, executing them when administrators view invoice details.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111110?
CVE-2026-111110 is a high-severity cross-site scripting vulnerability in stiofansisland Payment forms, Buy now buttons, and Invoicing System | GetPaid, published on 17 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-111110?
How do I fix CVE-2026-111110?
No fix has been published for CVE-2026-111110 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-111110 being exploited?
There is no known exploitation of CVE-2026-111110 in the wild and no public exploit code.
Sources
Also known as GHSA-xm8j-r35j-8pr2.