CVE-2026-13770 AppMySite <= 3.15.3 - Authenticated (Subscriber+) Stored Cross-Site Scripting via save_ams_license_key AJAX Handler
Authenticated attackers can inject arbitrary scripts via the license key handler, leading to potential session hijacking or malicious actions on behalf of other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-13770?
CVE-2026-13770 is a medium-severity cross-site scripting vulnerability in AppMySite – WordPress & WooCommerce Mobile App Builder (No-Code Android & iOS App Maker), published on 19 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The AppMySite – WordPress & WooCommerce Mobile App Builder (No-Code Android & iOS App Maker) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via save_ams_license_key AJAX Handler in all versions up to, and including, 3.15.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The save_ams_license_key AJAX handler performs no capability check and no nonce verification, meaning any authenticated user with Subscriber-level access or above can invoke it to store the malicious payload.
Weakness: CWE-79
Which versions are affected by CVE-2026-13770?
How do I fix CVE-2026-13770?
No fix has been published for CVE-2026-13770 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-2026-13770 being exploited?
There is no known exploitation of CVE-2026-13770 in the wild and no public exploit code.
Sources
Also known as GHSA-jvq2-fm7m-3q4c.