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CVE-2026-13770— AppMySite <= 3.15.3 - Authenticated (Subscriber+) Stored Cross-Site Scripting via save_ams_license_key AJAX Handler

Quick assessment

Affected
appmysite AppMySite – WordPress & WooCommerce Mobile App Builder (No-Code Android & iOS App Maker)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件 AppMySite – WordPress & WooCommerce Mobile App Builder（无代码 Android 和 iOS 应用生成器）在 3.15.3 及之前所有版本中，由于输入净化和输出转义不足，通过 AJAX 处理程序存在存储型跨站脚本（Stored XSS）漏洞。 这意味着拥有订阅者（Subscriber）级别及以上权限的已认证攻击者，可以向页面注入任意 Web 脚本，这些脚本将在用户访问被注入的页面时执行。 具体技术细节如下： AJAX 处理程序未执行权限检

CVSS 6.4 · Medium
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I. Basic Information for CVE-2026-13770

Vulnerability Information
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Vulnerability Title
AppMySite <= 3.15.3 - Authenticated (Subscriber+) Stored Cross-Site Scripting via save_ams_license_key AJAX Handler
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
appmysite AppMySite – WordPress & WooCommerce Mobile App Builder (No-Code Android & iOS App Maker) 0 ~ 3.15.3 -

II. Public POCs for CVE-2026-13770

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III. Intelligence Information for CVE-2026-13770

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Patches & Fixes for CVE-2026-13770 (2)

Security Blog Posts for CVE-2026-13770 (1)

Vendor Pages for CVE-2026-13770 (1)

Other References for CVE-2026-13770 (2)

IV. Related Vulnerabilities

Same vendor: appmysite
Same weakness: CWE-79

V. Comments for CVE-2026-13770

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