Improper privilege management in hassantafreshi Easy Form Builder by WhiteStudio – Drag &…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.
Summary
The Easy Form Builder by WhiteStudio plugin for WordPress is vulnerable to Unauthenticated Privilege Escalation to Administrator in versions up to, and including, 4.0.11 This is due to the password recovery flow using the publicly-visible session identifier ('sid') as the password reset token stored in wp_emsfb_temp_links, combined with a publicly-accessible nonce refresh endpoint (Emsfb/v1/nonce/refresh) that issues valid WordPress REST nonces to unauthenticated visitors. This makes it possible for unauthenticated attackers to reset the password of any WordPress user — including administrators — by scraping the public sid from a published login form page, submitting a recovery request for any known user email via Emsfb/v1/forms/message/add, and then calling Emsfb/v1/forms/recovery/efb_set_password with the known sid to set an arbitrary new password and gain full administrator access.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| hassantafreshi | Easy Form Builder by WhiteStudio – Drag & Drop Form Builder | up to 4.0.11 | — | No fix listed | CNA |
- Easy Form Builder by WhiteStudio – Drag & Drop Form Builder Vendorhassantafreshi Affected up to 4.0.11 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-13439
- 2026-10-03 Alias added: GHSA-3h5m-xwq3-mjmq
References
Other 8
- https://www.wordfence.com/threat-intel/vulnerabilities/id/df8326b6-a443-4f76-a755-49f89af74d7e?source=cve
- https://plugins.trac.wordpress.org/browser/easy-form-builder/trunk/includes/class-Emsfb-public.php#L5060
- https://plugins.trac.wordpress.org/browser/easy-form-builder/trunk/includes/class-Emsfb-public.php#L5024
- https://plugins.trac.wordpress.org/browser/easy-form-builder/trunk/includes/class-Emsfb-public.php#L1587
- https://plugins.trac.wordpress.org/browser/easy-form-builder/trunk/includes/class-Emsfb-public.php#L96
- https://plugins.trac.wordpress.org/browser/easy-form-builder/trunk/includes/class-Emsfb-public.php#L623
- https://plugins.trac.wordpress.org/changeset/3588226/easy-form-builder/trunk/includes/class-Emsfb-public.php
- https://plugins.trac.wordpress.org/changeset?old_path=%2Feasy-form-builder/tags/4.0.11&new_path=%2Feasy-form-builder/tags/4.0.12
More hassantafreshi vulnerabilities
- TI-2026-30970 WordPress Easy Form Builder plugin <= 4.0.6 - SQL Injection vulnerability CVSS 3.1CRITICAL 9.3
- TI-2025-34441 WordPress Easy Form Builder Plugin <= 3.8.15 - SQL Injection Vulnerability CVSS 3.1CRITICAL 9.3
- TI-2026-42480 WordPress Easy Form Builder plugin <= 4.0.12 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
- TI-2025-41331 WordPress Easy Form Builder plugin <= 3.8.20 - Broken Access Control vulnerability CVSS 3.1MEDIUM 5.3
- TI-2025-12853 Easy Form Builder <= 3.9.3 - Missing Authorization to Authenticated (Subscriber+) Sensitive Form Response Data Exposure CVSS 3.1MEDIUM 5.3
- TI-2024-11234 Easy Form Builder <= 3.8.8 - Missing Authorization to Authenticated (Subscriber+) Stored Cross-Site Scripting CVSS 3.1MEDIUM 6.4
Sources
- CVE-2026-13439 · CVE Program
- CVE-2026-13439 · NVD
- FIRST EPSS
- GHSA-3h5m-xwq3-mjmq · 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