AppMySite <= 3.15.3 - Authenticated (Subscriber+) Stored Cross-Site Scripting via save_ams_license_key AJAX Handler
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| AppMySite | AppMySite – WordPress & WooCommerce Mobile App Builder (No-Code Android & iOS App Maker) | up to 3.15.3 | — | No fix listed | CNA |
- AppMySite – WordPress & WooCommerce Mobile App Builder (No-Code Android & iOS App Maker) VendorAppMySite Affected up to 3.15.3 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-13770
- 2026-10-03 Alias added: GHSA-jvq2-fm7m-3q4c
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/34c573f4-bc21-4a5f-a44a-779c523c3212?source=cve
- https://plugins.trac.wordpress.org/browser/appmysite/tags/3.15.3/includes/views/ams-home.php#L125
- https://plugins.trac.wordpress.org/browser/appmysite/tags/3.15.3/includes/class-ams-admin-functions.php#L67
- https://plugins.trac.wordpress.org/browser/appmysite/tags/3.15.3/includes/class-ams-admin-functions.php#L34
- https://plugins.trac.wordpress.org/browser/appmysite/tags/3.15.3/includes/views/ams-home.php#L222
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3635325%40appmysite&new=3635325%40appmysite
More AppMySite vulnerabilities
- TI-2023-27172 WordPress AppMySite Plugin <= 3.11.0 is vulnerable to Sensitive Data Exposure CVSS 3.1HIGH 7.5
- TI-2026-63453 WordPress AppMySite plugin <= 3.15.4 - Broken Access Control vulnerability CVSS 3.1MEDIUM 6.5
- TI-2025-36347 WordPress AppMySite plugin <= 3.15.0 - Broken Access Control vulnerability CVSS 3.1MEDIUM 5.3
Sources
- CVE-2026-13770 · CVE Program
- CVE-2026-13770 · NVD
- FIRST EPSS
- GHSA-jvq2-fm7m-3q4c · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences