Is CVE-2025-66434 actively exploited?

CVE-2025-66434 has no public evidence of in-the-wild exploitation as of 2025-12-23.

What is the CVSS score for CVE-2025-66434?

CVE-2025-66434 has a CVSS score of 8.8 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2025-66434?

Patch guidance is available from frappe security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-66434.

Fix CVE-2025-66434 - HIGH frappe erpnext

Description

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 Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-94 · Code Injection CWE-1336

Metadata

Primary Vendor: FRAPPE
Published: 12/15/2025
Last Modified: 12/23/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

frappe : erpnext

Remediation Guidance

Executive Summary

Cite this page

CVE-2025-66434. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2025-66434

View on NIST NVD

CVE-2025-66434 vulnerability