Easy Appointments <= 3.12.27 - Missing Authorization to Authenticated (Author+) Bulk Appointment Manipulation
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
The Easy Appointments plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.12.27. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with author-level access and above, to cancel all upcoming appointments site-wide by marking every future appointment stored by the plugin as abandoned. The nonce required to authenticate the cancellation request is printed on the Appointments admin page, which is itself gated only by the edit_posts capability that Authors possess, making the nonce readily accessible to low-privileged users.
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 |
|---|---|---|---|---|---|
| alextselegidis | Easy Appointments | up to 3.12.27 | — | No fix listed | CNA |
- Easy Appointments Vendoralextselegidis Affected up to 3.12.27 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-11992
- 2026-10-03 Alias added: GHSA-xfx8-39w8-9g2h
References
Other 9
- https://www.wordfence.com/threat-intel/vulnerabilities/id/eea33d0b-2547-4c51-8c4c-d178d6c8502d?source=cve
- https://plugins.trac.wordpress.org/browser/easy-appointments/tags/3.12.25/src/ajax.php#L563
- https://plugins.trac.wordpress.org/browser/easy-appointments/tags/3.12.25/src/ajax.php#L619
- https://plugins.trac.wordpress.org/browser/easy-appointments/tags/3.12.25/src/ajax.php#L180
- https://plugins.trac.wordpress.org/browser/easy-appointments/tags/3.12.25/src/templates/appointments.tpl.php#L302
- https://plugins.trac.wordpress.org/browser/easy-appointments/tags/3.12.24.1/src/ajax.php#L563
- https://plugins.trac.wordpress.org/browser/easy-appointments/tags/3.12.24.1/src/ajax.php#L619
- https://plugins.trac.wordpress.org/browser/easy-appointments/tags/3.12.24.1/src/ajax.php#L180
- https://plugins.trac.wordpress.org/browser/easy-appointments/tags/3.12.24.1/src/templates/appointments.tpl.php#L302
More alextselegidis vulnerabilities
- TI-2023-01200 Use of Hard-coded Credentials in alextselegidis/easyappointments CVSS 3.1CRITICAL 9.8
- TI-2026-70736 Easy!Appointments authorization bypass lets attackers modify bookings CVSS 4.0HIGH 8.8
- TI-2024-37956 An issue in Alex Tselegidis EasyAppointments v.1.5.0 allows a remote attacker to escalate… CVSS 3.1CRITICAL 9.8
- TI-2026-19023 CSRF Protection Bypass: Sensitive endpoints accept GET requests, enabling admin account takeover CVSS 4.0HIGH 7.4
- TI-2025-32119 alextselegidis Easy!Appointments v1.5.1 was discovered to contain a SQL injection… CVSS 3.1HIGH 8.1
- TI-2023-01980 Session Fixation in alextselegidis/easyappointments CVSS 3.1HIGH 8.8
Sources
- CVE-2026-11992 · CVE Program
- CVE-2026-11992 · NVD
- FIRST EPSS
- GHSA-xfx8-39w8-9g2h · 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