CVE-2026-7797 json
Appointment Booking Calendar <= 1.6.11.8 - Unauthenticated SQL Injection via 'append_where_sql' Parameter
published 2026-05-28 5 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-32739
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Classification
- Weakness
-
- CWE-89 Improper Neutralization of Special Elements used in an SQL Command
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/db3bddbd-44b0-4105-9039-0d669d643481?source=cve
- plugins.trac.wordpress.org /browser/simply-schedule-appointments/trunk/includes/lib/td-util/class-td-db-model.php#L1049
- plugins.trac.wordpress.org /browser/simply-schedule-appointments/tags/1.6.11.2/includes/lib/td-util/class-td-db-model.php#L1049
- plugins.trac.wordpress.org /browser/simply-schedule-appointments/trunk/includes/lib/td-util/class-td-api-model.php#L304
- plugins.trac.wordpress.org /browser/simply-schedule-appointments/tags/1.6.11.2/includes/lib/td-util/class-td-api-model.php#L304
- plugins.trac.wordpress.org /browser/simply-schedule-appointments/trunk/includes/lib/td-util/class-td-api-model.php#L361
- plugins.trac.wordpress.org /browser/simply-schedule-appointments/tags/1.6.11.2/includes/lib/td-util/class-td-api-model.php#L361
- plugins.trac.wordpress.org /browser/simply-schedule-appointments/tags/1.6.10.2/includes/lib/td-util/class-td-db-model.php#L1049
- plugins.trac.wordpress.org /browser/simply-schedule-appointments/tags/1.6.10.2/includes/lib/td-util/class-td-api-model.php#L304
- plugins.trac.wordpress.org /browser/simply-schedule-appointments/tags/1.6.10.2/includes/lib/td-util/class-td-api-model.php#L361
- plugins.trac.wordpress.org /changeset/3549843/simply-schedule-appointments/tags/1.6.11.9/includes/lib/td-util/class-td-db-model.php
Sources
- CVE List CVE-2026-7797
- NVD CVE-2026-7797
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.