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Critical · 9.9 CVE-2026-63233 EUVD-2026-50128GHSA-x5f8-9c9r-5w63

SQL injection and unsafe deserialisation vulnerability

Published Jul 29, 2026 · Updated Jul 29, 2026 · Assigned by CSA

Description

A SQL injection and unsafe deserialisation
vulnerability in Koollab LMS allowed an authenticated attacker to inject through the assessment
overall answer endpoint, control data passed to unserialize(), write a webshell
to a publicly accessible location, and execute arbitrary code on the server.

Affected products

VendorProductAffectedFixed
Three Learning Koollab LMS 5.3.2 —

References