CVE-2026-33657

CVE-2026-33657 affects EspoCRM up to version 9.3.3, where an stored HTML injection vulnerability allows an authenticated user with standard privileges to inject HTML into system-generated email notifications. Root cause: server-side Handlebars templates render the unescaped post field (triple-bra...

CVE-2026-33657 EspoCRM: Stored HTML injection in email notifications about stream notes via unescaped post field

EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below have a stored HTML injection vulnerability that allows any authenticated user with standard non-administrative privileges to inject arbitrary HTML into system-generated email notifications by crafting...

CVE-2026-33657 EspoCRM: Stored HTML injection in email notifications about stream notes via unescaped post field

EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below have a stored HTML injection vulnerability that allows any authenticated user with standard non-administrative privileges to inject arbitrary HTML into system-generated email notifications by crafting...