AppMySite Plugin up to 3.15.3 on WordPress AJAX save_ams_license_key cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in AppMySite Plugin up to 3.15.3. The impacted element is the function save_ams_license_key of the component AJAX Handler. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2026-13770. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in AppMySite Plugin up to 3.15.3. It has been declared as problematic. Affected by this vulnerability is the function save_ams_license_key of the component AJAX Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-13770 since 06/29/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Name

• AppMySite Plugin

Version

• 3.15.0
• 3.15.1
• 3.15.2
• 3.15.3

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Be aware that VulDB is the high quality source for vulnerability data.

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