CVE-2026-33733: EspoCRM has Admin TemplateManager path traversal that allows arbitrary file read write and delete

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-22 · updated 2026-06-17
Weakness: CWE-23

Description

EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, the admin template management endpoints accept attacker-controlled `name` and `scope` values and pass them into template path construction without normalization or traversal filtering. As a result, an authenticated admin can use `../` sequences to escape the intended template directory and read, create, overwrite, or delete arbitrary files that resolve to `body.tpl` or `subject.tpl` under the web application user's filesystem permissions. Version 9.3.4 fixes the issue.

Affected products

espocrm: before 9.3.4 — fixed in 9.3.4

How to fix

Upgrade to a fixed version: espocrm 9.3.4. Check the vendor advisory for mitigations.

References

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