Instant Appointment <= 1.2 - Unauthenticated Arbitrary File Upload
Priority MEDIUM 51CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- 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-434.
Summary
The Instant Appointment plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'insapp_upload_image_as_attachment' function in all versions up to, and including, 1.2. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01079 65th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 |
|---|---|---|---|---|---|
| tenteeglobal | Instant Appointment | up to 1.2 | — | No fix listed | CNA |
- Instant Appointment Vendortenteeglobal Affected up to 1.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-15282
- 2026-10-03 Alias added: GHSA-xp53-g87w-p23f
References
Other 4
- https://www.wordfence.com/threat-intel/vulnerabilities/id/097b1530-64fa-45b2-85f3-c6a2311405b5?source=cve
- https://plugins.trac.wordpress.org/browser/instant-appointment/trunk/includes/ajax/ajax_services.php#L3
- https://plugins.trac.wordpress.org/browser/instant-appointment/trunk/includes/front-end/ajax/login_ajax.php#L584
- https://plugins.trac.wordpress.org/browser/instant-appointment/trunk/includes/front-end/ajax/login_ajax.php#L598
More tenteeglobal vulnerabilities
- TI-2024-36449 WordPress Instant Appointment plugin <= 1.2 - SQL Injection vulnerability CVSS 3.1CRITICAL 9.3
- TI-2025-17439 WordPress Instant Appointment plugin <= 1.2 - Reflected Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
Sources
- CVE-2026-15282 · CVE Program
- CVE-2026-15282 · NVD
- FIRST EPSS
- GHSA-xp53-g87w-p23f · 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