Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
1DescriptionCVE.org
The LatePoint - Calendar Booking Plugin for Appointments and Events plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'first_name' parameter in all versions up to, and including, 5.5.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AnalysisAI
Stored Cross-Site Scripting in LatePoint Calendar Booking Plugin for WordPress allows unauthenticated remote attackers to inject malicious JavaScript via the 'first_name' parameter in appointment booking forms, affecting all versions through 5.5.0. The injected scripts persist in the database and execute whenever administrators or other users view booking records, potentially enabling session hijacking, privilege escalation, or further attacks against site administrators. The CVSS vector indicates network-accessible exploitation with no authentication required and changed scope, enabling attacks beyond the vulnerable component. EPSS score not provided; no confirmation of active exploitation (not in CISA KEV) or public exploit code at time of analysis.
Technical ContextAI
This vulnerability affects the LatePoint appointment booking plugin for WordPress (cpe:2.3:a:latepoint:latepoint_-_calendar_booking_plugin_for_appointments_and_events), specifically in customer data handling across multiple components: activities_controller.php (line 270), customer_model.php (line 376), replacer_helper.php (line 276), and email_helper.php (line 50). The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The flaw stems from insufficient input sanitization when processing the 'first_name' field during appointment creation and inadequate output escaping when displaying this data in administrative interfaces and email templates. Unlike reflected XSS, this stored variant persists the malicious payload in the WordPress database, making it execute repeatedly across multiple user sessions without requiring the attacker to repeatedly deliver the payload. The code references show the vulnerable data flow from user input through model storage to output rendering without proper HTML entity encoding or Content Security Policy protections.
RemediationAI
Upgrade LatePoint - Calendar Booking Plugin for Appointments and Events to a version newer than 5.5.0 that incorporates changeset 3522933 or later from the WordPress plugin repository, which addresses the input sanitization and output escaping deficiencies. The specific patched version number is not independently confirmed from available data-verify the latest stable release from the WordPress plugin directory or contact the vendor directly. Review existing appointment records for suspicious content in customer first_name fields using SQL queries against the WordPress database (wp_latepoint_customers table or equivalent), searching for common XSS patterns like <script>, onerror=, or javascript: URIs. If immediate patching is not feasible, implement compensating controls: restrict access to administrative booking management interfaces using IP allowlisting or VPN requirements (reduces exposure to stored payload execution but does not prevent injection); enable WordPress Content Security Policy headers via security plugins to limit inline script execution (may break legitimate plugin functionality-test thoroughly); implement Web Application Firewall rules to block common XSS patterns in POST requests to booking endpoints (pattern-based detection has bypass risks). Database sanitization of existing records should be performed carefully to avoid data corruption-consider using WordPress's wp_kses() function with appropriate allowed tags or engaging professional incident response if compromise is suspected. Consult Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/c8eedec9-d8d4-4052-baec-29f83ac306ac for vendor-specific guidance.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-27542
GHSA-mj2w-r8cc-jq9c