Appointment Booking Calendar <= 1.6.11.8 - Unauthenticated SQL Injection via 'append_where_sql' Parameter
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- SQL injection
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-89.
Summary
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to time-based blind SQL Injection via the 'append_where_sql' parameter in all versions up to, and including, 1.6.11.8 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The /appointments/bulk REST endpoint is reachable by unauthenticated attackers because its permission check accepts a public nonce that is embedded in the booking widget's frontend JavaScript (ssa.api.public_nonce) and visible to all site visitors; exploitation requires issuing the request as a PUT with an application/x-www-form-urlencoded body so that PHP's superglobals are not populated and the blocklist check silently passes.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 |
|---|---|---|---|---|---|
| croixhaug | Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin | up to 1.6.11.8 | — | No fix listed | CNA |
- Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin Vendorcroixhaug Affected up to 1.6.11.8 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-7797
- 2026-10-03 Alias added: GHSA-8h7g-4m22-x8gv
- 2026-10-25 EPSS moved to the below the 50th percentile
References
Other 11
- https://www.wordfence.com/threat-intel/vulnerabilities/id/db3bddbd-44b0-4105-9039-0d669d643481?source=cve
- https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/includes/lib/td-util/class-td-db-model.php#L1049
- https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.11.2/includes/lib/td-util/class-td-db-model.php#L1049
- https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/includes/lib/td-util/class-td-api-model.php#L304
- https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.11.2/includes/lib/td-util/class-td-api-model.php#L304
- https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/includes/lib/td-util/class-td-api-model.php#L361
- https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.11.2/includes/lib/td-util/class-td-api-model.php#L361
- https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.10.2/includes/lib/td-util/class-td-db-model.php#L1049
- https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.10.2/includes/lib/td-util/class-td-api-model.php#L304
- https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.10.2/includes/lib/td-util/class-td-api-model.php#L361
- https://plugins.trac.wordpress.org/changeset/3549843/simply-schedule-appointments/tags/1.6.11.9/includes/lib/td-util/class-td-db-model.php
More croixhaug vulnerabilities
- TI-2026-46678 WordPress Simply Schedule Appointments plugin <= 1.6.12.10 - SQL Injection vulnerability CVSS 3.1CRITICAL 9.3
- TI-2026-28467 WordPress Simply Schedule Appointments plugin <= 1.6.9.27 - SQL Injection vulnerability CVSS 3.1CRITICAL 9.3
- TI-2026-62275 Missing authorization in croixhaug Simply Schedule Appointments CVSS 3.1HIGH 7.5
- TI-2026-58265 WordPress Simply Schedule Appointments plugin <= 1.6.12.23 - Cross Site Request Forgery (CSRF) vulnerability CVSS 3.1HIGH 8.8
- TI-2026-30684 WordPress Simply Schedule Appointments plugin < 1.6.11.2 - Sensitive Data Exposure vulnerability CVSS 3.1HIGH 7.5
- TI-2026-03153 Appointment Booking Calendar <= 1.6.10.0 - Unauthenticated SQL Injection via 'fields' Parameter CVSS 3.1HIGH 7.5
Sources
- CVE-2026-7797 · CVE Program
- CVE-2026-7797 · NVD
- FIRST EPSS
- GHSA-8h7g-4m22-x8gv · 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