CVE-2025-66434

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 v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://iamanc.github.io/post/erpnext-ssti-bug-1	Exploit Third Party Advisory
https://www.notion.so/SSTI-bug-1-239e6086eadc8096bfcfe90551a3a483?source=copy_link	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:frappe:erpnext:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-12-15 17:15

Updated : 2025-12-23 17:57

NVD link : CVE-2025-66434

Mitre link : CVE-2025-66434

CVE.ORG link : CVE-2025-66434

JSON object : View

Products Affected

frappe

erpnext

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

CWE-1336

Improper Neutralization of Special Elements Used in a Template Engine

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