CVE-2026-13161: SQL Injection (CVSS 7.5)

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.

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CVSS v3.1 Score

7.5

HIGH

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

EPSS — Exploit Prediction

0.0045

Probability of exploitation

0.37%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-89 SQL Injection

References

Other References

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-booking%2Ftrunk%2Fmain%2Ffunction_ajax.php&old=3581699%40truebooker-appointment-booking%2Ftrunk%2Fmain%2Ffunction_ajax.php&sfp_email=&sfph_mail= https://www.wordfence.com/threat-intel/vulnerabilities/id/9b0e973b-f0bf-44d1-b964-e259f68291aa?source=cve

Frequently Asked Questions

What is CVE-2026-13161? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-13161? +

CVE-2026-13161 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0045, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-13161? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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