Combodo iTop is a web based IT service management tool. Prior to 3.2.3, inline images that are accessible without being authenticated are protected by a weak 24-bit pseudo-random secret. This issue has been fixed in version 3.2.3.
https://github.com/Combodo/iTop/security/advisories/GHSA-3jr5-rqmx-97gc
http://github.com/Combodo/iTop/commit/9c39efd9af53a1deeb578133eff7333a7b8816b0