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TrueBooker CVE-2026-13161

| EUVDEUVD-2026-49722 HIGH
SQL Injection (CWE-89)
2026-07-28 security@wordfence.com GHSA-xm72-j57q-p3m6
7.5
CVSS 3.1 · Vendor: wordfence
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Retrieve nonce from public booking page
  2. Delivery
    Craft POST request with SQL payload in alldata[truebooker_user] and required booking fields
  3. Exploit
    Send request to admin-ajax.php
  4. Execution
    Unsanitized SQL query executes
  5. Impact
    Extract sensitive information from the database

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Parameterized queries, prepared statements
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Persistence

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires that the attacker submits a POST request with the 'alldata[truebooker_user]' parameter set to an SQL injection payload and the mandatory booking fields (category, service, person, date, time slot) present in the alldata array, so that execution reaches the vulnerable SQL branch. The nonce can be obtained by any unauthenticated visitor from the front-end booking form, so no authentication is needed. No other special configuration is necessary; the vulnerability exists in the default plugin setup.

Impact

CVSS 3.1 base score 7.5 (High) with a network attack vector, low complexity, no privileges required, and no user interaction, leading to high confidentiality impact only. No EPSS score is available to estimate exploitation probability, and the vulnerability is not listed in CISA KEV, indicating no known active exploitation at this time. However, the low attack complexity and the public exposure of the required nonce on front-end pages make this a realistic threat for data theft, especially on sites where the plugin is active and booking pages are publicly accessible.

Exploit ScenarioDerived

An attacker extracts the nonce from a public TrueBooker booking page, then sends a crafted POST request to wp-admin/admin-ajax.php containing the 'alldata[truebooker_user]' parameter with an SQL injection payload and all required booking fields (category, service, person, date, time slot). The vulnerable code constructs an unsafe SQL query, allowing the attacker to retrieve sensitive database contents such as user credentials or configuration data.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 28, 2026

Unauthenticated SQL injection in the TrueBooker WordPress plugin allows remote attackers to extract sensitive database information. The vulnerability resides in the 'alldata[truebooker_user]' parameter and affects versions up to and including 1.2.2. Although a nonce is used, it is exposed on front-end booking pages, enabling unauthenticated exploitation if the required booking fields are present.

RemediationAI

Upgrade the TrueBooker plugin to a version newer than 1.2.2. A fix has been committed to the plugin's trunk, as shown in the changeset comparison between version 1.2.2 and the development trunk. Until an official patched release is published, monitor the plugin's WordPress.org page for an update. If immediate update is not feasible, consider temporarily disabling the plugin; blocking access to booking pages may break functionality. No specific later release version is confirmed from the provided references.

Affected VersionsENISA

Truebooker – Appointment Booking and Scheduler System 0 ≤1.2.2

Affected Packages

euvd truebooker_appointment_booking_and_scheduler_system no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The vulnerability is in the TrueBooker - Appointment Booking and Scheduler System plugin for WordPress, specifically in the file main/function_ajax.php, where user-supplied data from the 'alldata[truebooker_user]' parameter is incorporated into an SQL query without sufficient escaping or parameterization. This falls under CWE-89 (SQL Injection). The affected product is the WordPress plugin 'truebooker-appointment-booking', version 1.2.2 and earlier, as shown by the plugin's SVN repository references.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (wordfence) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 7.5 HIGH

Network attack, no privileges or user interaction required, scope unchanged, only confidentiality affected, consistent with description.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (wordfence).

CVSS VectorVendor: wordfence

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

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.

Threat Intelligence Overview

EPSS Score
0.5%
Top 63% exploitable
Prevalence
Low
niche appointment booking plugin with limited deployment footprint
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.5%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

SQL injection exploits the way applications construct database queries by mixing user input directly into SQL statements.

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