What the vulnerability does
01Description
WordPress appointment-booking-calendar 1.1.24 contains multiple privilege escalation vulnerabilities that allow unauthenticated attackers to modify calendar settings and inject persistent cross-site scripting payloads through the admin.php page parameters. Attackers can inject malicious JavaScript into the 'ict' and 'ics' options or the calendar 'name' parameter via GET requests to execute arbitrary scripts when the calendar is displayed or accessed in the administration interface.
Explanation of Vulnerability in Simple Terms
02Summary
Booking Calendar Contact versions up to 1.1.24 contain a cross-site scripting (XSS) vulnerability. An authenticated user can inject malicious scripts that execute in other users' browsers when they view affected pages. The vulnerability requires user interaction to trigger. Update to a version newer than 1.1.24.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers when they view affected pages.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other site visitors, potentially stealing session data or credentials.
Conditions required to exploit
05Prerequisites
Attacker must have low-level authentication; victim must visit a page containing the injected script.
Key dates
06Disclosure timeline
June 15, 2026
CVE published
June 15, 2026
Record updated
