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Vulnerability record · CVE-2026-13161 · published 28 July 2026

CVE-2026-13161: SQL injection vulnerability

The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress is vulnerable to generic SQL Injection via the 'alldata[truebooker_user]' parameter in all versions up to, and including, 1.2.2 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 check_ajax_referer() nonce guard does not constitute an authentication or authorization barrier because the nonce is exposed to unauthenticated visitors on TrueBooker front-end booking pages; exploitation additionally requires that the required booking fields (category, service, person, date, and time slot) be present in the alldata POST parameter so that execution reaches the vulnerable SQL query branch.

7.5 CVSS 3.1 High EPSS 0.77% · top 46.1% CWE-89 · SQL injection Deferred
7.5CVSS 3.1 base score
0.77%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
8References
28 Jul 2026Last modified by NVD

Description

The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress is vulnerable to generic SQL Injection via the 'alldata[truebooker_user]' parameter in all versions up to, and including, 1.2.2 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 check_ajax_referer() nonce guard does not constitute an authentication or authorization barrier because the nonce is exposed to unauthenticated visitors on TrueBooker front-end booking pages; exploitation additionally requires that the required booking fields (category, service, person, date, and time slot) be present in the alldata POST parameter so that execution reaches the vulnerable SQL query branch.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/truebooker-appointment-booking/tags/1.2.0/main/function_ajax.php#L14741
https://plugins.trac.wordpress.org/browser/truebooker-appointment-booking/tags/1.2.0/main/function_ajax.php#L14756
https://plugins.trac.wordpress.org/browser/truebooker-appointment-booking/tags/1.2.0/main/function_ajax.php#L14866
https://plugins.trac.wordpress.org/browser/truebooker-appointment-booking/tags/1.2.2/main/function_ajax.php#L14741
https://plugins.trac.wordpress.org/browser/truebooker-appointment-booking/tags/1.2.2/main/function_ajax.php#L14756
https://plugins.trac.wordpress.org/browser/truebooker-appointment-booking/tags/1.2.2/main/function_ajax.php#L14866
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3591506%40truebooker-appointment-bookin
https://www.wordfence.com/threat-intel/vulnerabilities/id/9b0e973b-f0bf-44d1-b964-e259f68291aa?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-13161), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.