Within the "View Contact" screen and its sub-pages, there were multiple cross-site scripting vulnerabilities.
CiviCRM version 5.74.3 and earlier
CiviCRM version 5.74.4 and 5.69.6 (ESR)
Upgrade to the fixed version of CiviCRM
Québec Ministère de la Cybersécurité et du Numérique; Claude Bernard Lyon 1 University - Security team; CiviCRM/JMA Consulting - Seamus Lee; Greenpeace Central and Eastern Europe - Patrick Figel; Coop SymbioTIC - Mathieu Lutfy; CiviCRM - Tim Otten
security/core#130, security/core#133, security/core#173, security/core#174