CVE-2025-66434
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk47th percentile - higher than 47% of all known CVEs
Summary
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.
Risk Assessment
An attacker could execute code in a restricted but unsafe context of the ERPNext server, potentially leading to database information disclosure. It requires authentication and appropriate permissions.
Recommendation
Upgrade Frappe ERPNext to a version later than 15.89.0 that includes the fix. Restrict permissions for configuring Dunning Type and monitor for suspicious activities.
Other vulnerabilities in Frappe ERPNext
See all- CVE-2026-109674Medium
Frappe ERPNext before 15.98.0 and 16.x before 16.6.0 contains an SQL injection vulnerability in some endpoints caused by missing input validation.
- CVE-2026-109673High
Frappe ERPNext before 15.103.0 and 16.x before 16.12.0 contains a stored cross-site scripting vulnerability because the names of certain records are not properly neutralized when rendered on some dashboards, tools, and portals. Authenticated attackers can craft malicious record names that execute scripts in other users' browsers.
- CVE-2026-109672Medium
Frappe ERPNext before 15.118.0 and 16.x before 16.27.0 contains a missing authorization vulnerability in certain endpoints that fail to enforce proper authorization checks.
- CVE-2026-109671High
Frappe ERPNext before 15.113.0 and 16.x before 16.24.0 contains a stored cross-site scripting vulnerability in a profile field that is rendered without escaping into portal pages. Low-privilege attackers can store malicious script in the field that executes in the browser of any administrator viewing those pages.
- CVE-2026-109670Medium
Frappe ERPNext before 15.110.0 and 16.x before 16.21.0 contains a stored cross-site scripting vulnerability caused by record names being rendered without escaping.
- CVE-2026-109669Medium
Frappe ERPNext before 15.110.0 and 16.x before 16.21.0 contains a missing authorization vulnerability in which certain endpoints fail to enforce proper authorization checks on record status changes.
- CVE-2026-109668Medium
Frappe ERPNext before 15.110.0 and 16.x before 16.21.0 contains a missing authorization vulnerability in certain endpoints that handle party records, allowing authenticated users to modify data beyond their permitted role.
- CVE-2026-109667High
Frappe ERPNext before 15.111.0 and 16.x before 16.22.0 contains a privilege escalation vulnerability in a record-creation endpoint that takes the record type from the request and inserts the record with permission checks disabled. Any authenticated user, including one holding no operational role, can supply a privileged record type to create privileged accounts.
- CVE-2026-109666Medium
Frappe ERPNext before 15.110.0 and 16.x before 16.21.0 contains a missing authorization vulnerability in certain endpoints that fail to enforce proper permission checks on inventory records.
- CVE-2026-109665Medium
Frappe ERPNext before 15.108.0 and 16.x before 16.18.0 contains a missing authorization vulnerability in certain endpoints that fail to enforce proper permission checks.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS