CVE-2026-13770 json
AppMySite <= 3.15.3 - Authenticated (Subscriber+) Stored Cross-Site Scripting via save_ams_license_key AJAX Handler
published 2026-09-19 50 d ago modified 2026-09-21 48 d ago also EUVD-2026-83542
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 50 d ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- appmysite AppMySite – WordPress & WooCommerce Mobile App Builder (No-Code Android & iOS App Maker)
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
- wordfence.com /threat-intel/vulnerabilities/id/34c573f4-bc21-4a5f-a44a-779c523c3212?source=cve
- plugins.trac.wordpress.org /browser/appmysite/tags/3.15.3/includes/views/ams-home.php#L125
- plugins.trac.wordpress.org /browser/appmysite/tags/3.15.3/includes/class-ams-admin-functions.php#L67
- plugins.trac.wordpress.org /browser/appmysite/tags/3.15.3/includes/class-ams-admin-functions.php#L34
- plugins.trac.wordpress.org /browser/appmysite/tags/3.15.3/includes/views/ams-home.php#L222
- plugins.trac.wordpress.org /changeset?reponame=&old=3635325%40appmysite&new=3635325%40appmysite
Sources
- CVE List CVE-2026-13770
- NVD CVE-2026-13770
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.