CVE-2026-33733

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Path Traversal in EspoCRM Admin Template Allows Arbitrary File Access

Publication date: 2026-04-22

Last updated on: 2026-04-27

Assigner: GitHub, Inc.

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-22

Last Modified

2026-04-27

Generated

2026-07-06

AI Q&A

2026-04-23

EPSS Evaluated

2026-07-04

NVD

CVE-2026-33733

Affected Vendors & Products

Vendor	Product	Version / Range
espocrm	espocrm	to 9.3.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-23	The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.

Attack-Flow Graph

Executive Summary

This vulnerability exists in EspoCRM versions prior to 9.3.4. The admin template management endpoints accept attacker-controlled 'name' and 'scope' values without proper normalization or filtering for directory traversal sequences like '../'. An authenticated admin can exploit this by using these sequences to escape the intended template directory and access files named 'body.tpl' or 'subject.tpl' anywhere in the web application user's filesystem.

This allows the attacker to read, create, overwrite, or delete arbitrary files within the permissions of the web application user.

The issue was fixed in version 9.3.4.

Impact Analysis

This vulnerability can have severe impacts because it allows an authenticated admin to manipulate critical template files arbitrarily.

Reading sensitive files could lead to information disclosure.
Creating or overwriting files could allow injection of malicious code or modification of application behavior.
Deleting files could disrupt application functionality.

Overall, this can compromise the confidentiality, integrity, and availability of the application and its data.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade EspoCRM to version 9.3.4 or later, as this version fixes the issue.

Additionally, restrict admin access to trusted users only, since the vulnerability requires authenticated admin privileges.

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