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.
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Meta Information
Published
2026-04-22
Last Modified
2026-04-27
Generated
2026-06-16
AI Q&A
2026-04-23
EPSS Evaluated
2026-06-14
NVD
CVE-2026-33733
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
espocrm espocrm to 9.3.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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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.
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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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