Security Advisory

CVE-2026-33656

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-04-22 20:01:24

Last updated 2026-04-23 13:47:56

Assigner GitHub_M

State PUBLISHED

Description

EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, EspoCRMs built-in formula scripting engine allowing updating attachments sourceId thus allowing an authenticated admin to overwrite the `sourceId` field on `Attachment` entities. Because `sourceId` is concatenated directly into a file path with no sanitization in `EspoUploadDir::getFilePath()`, an attacker can redirect any file read or write operation to an arbitrary path within the web servers `open_basedir` scope. Version 9.3.4 fixes the issue.

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