In MISP before 2.4.172, title_for_layout is not properly sanitized in Correlations, CorrelationExclusions, and Layouts.
https://zigrin.com/advisories/misp-stored-xss/
https://github.com/MISP/MISP/compare/v2.4.171...v2.4.172
https://github.com/MISP/MISP/commit/286c84fab0047726a6a396ceefaae1bb666fc485
http://packetstormsecurity.com/files/176975/MISP-2.4.171-Cross-Site-Scripting.html