Easy Appointments 4.0 — 4.0.2.1 - Unauthenticated Insecure Direct Object Reference
CVE-2026-87966Published · Updated Action summary
Affected: 4.0 – 4.0.2.1Update to 4.0.2.2 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Easy Appointments easy-appointments
- Affected4.0 – 4.0.2.1
- Patched in4.0.2.2
Update to 4.0.2.2 or newer.
You are affected if you run 4.0 – 4.0.2.1. Version 4.0.2.2 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Easy Appointments.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 4.0.2.2, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Easy Appointments to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to blast.
The Easy Appointments plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions 4.0 to 4.0.2.1. This is due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to perform an unauthorized action.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Easy Appointments
All 23| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.5 | Missing Authorization to Authenticated (Contributor+) Sensitive Customer Information Exposure via ea_get_customers_ajax AJAX Action ≤3.12.27Update to 3.12.28 | CVE-2026-9232 | |
| Medium5.3 | Missing Authorization ≤4.0.2.1Update to 4.0.2.2 | CVE-2026-87965 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤4.0.2.1No patch available | CVE-2026-81798 | |
| Medium4.3 | Authenticated (Contributor+) Information Exposure <4.0.1Update to 4.0.1 | CVE-2026-19406 | |
| Medium4.3 | Missing Authorization <3.12.28Update to 3.12.28 | CVE-2026-14222 |
- Medium6.5Missing Authorization to Authenticated (Contributor+) Sensitive Customer Information Exposure via ea_get_customers_ajax AJAX Action
≤3.12.27Update to 3.12.28
- Medium5.3Missing Authorization
≤4.0.2.1Update to 4.0.2.2
- High7.2Unauthenticated Stored Cross-Site Scripting
≤4.0.2.1No patch available
- Medium4.3Authenticated (Contributor+) Information Exposure
<4.0.1Update to 4.0.1
- Medium4.3Missing Authorization
<3.12.28Update to 3.12.28
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.