CVE-2023-39543: Luxsoft Luxcal Web Calendar

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

Cross-site scripting vulnerability in LuxCal Web Calendar prior to 5.2.3M (MySQL version) and LuxCal Web Calendar prior to 5.2.3L (SQLite version) allows a remote unauthenticated attacker to execute an arbitrary script on the web browser of the user who is using the product.

Affected products

• Luxsoft Luxcal Web Calendar: before 5.2.3m (fixed in 5.2.3m); before 5.2.3l (fixed in 5.2.3l)

Published 2023-08-21. Last modified 2026-06-17.