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CVE-2025-66434

🔴 HIGH

An SSTI (Server-Side Template Injection) vulnerability exists in the get_dunning_letter_text method of Frappe ERPNext through 15.89.0. The function renders attacker-controlled Jinja2 templates (body_t...

Published
Dec 15, 2025
Last Modified
Dec 17, 2025
Views
10
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Description

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An SSTI (Server-Side Template Injection) vulnerability exists in the get_dunning_letter_text method of Frappe ERPNext through 15.89.0. The function renders attacker-controlled Jinja2 templates (body_text) using frappe.render_template() with a user-supplied context (doc). Although Frappe uses a custom SandboxedEnvironment, several dangerous globals such as frappe.db.sql are still available in the execution context via get_safe_globals(). An authenticated attacker with access to configure Dunning Type and its child table Dunning Letter Text can inject arbitrary Jinja expressions, resulting in server-side code execution within a restricted but still unsafe context. This can leak database information.

CVSS Scores

CVSS 3.1 8.8
8.8
HIGH
CVSS 2.0 8.8

References

iamanc.github.io www.notion.so

Additional Information

Source
cve@mitre.org
State
Undergoing analysis

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