iTop is an IT service management platform. When creating or updating an object, extkey values aren't checked to be in the current user silo. In other words, by forging an http request, the user can create objects pointing to out of silo objects (for example a UserRequest in an out of scope Organization). Fixed in iTop 2.7.10, 3.0.4, 3.1.1, and 3.2.0.
https://github.com/Combodo/iTop/security/advisories/GHSA-245j-66p9-pwmh
https://github.com/Combodo/iTop/commit/8f61c02cbe17badff87bff9b8ada85e783c47385
https://github.com/Combodo/iTop/commit/5a434486443a2cf8b8a288475aada54d0a068ca7