CVE-2025-66434Public exploitNetwork attack vector

Database disclosure via unsafe Dunning template rendering

Published Dec 15, 2025 · Updated Dec 15, 2025

Server-side template injection in Frappe ERPNext 15.89.0 and earlier allows remote authenticated users to read database data. The get_dunning_letter_text method passes attacker-controlled Dunning Letter Text fields to frappe.render_template(), whose safe globals expose frappe.db.sql. Exploitation requires permission to configure Dunning Type content; injected Jinja expressions run server-side and can issue arbitrary SQL queries within the sandboxed context.

CVSS severity8.8
High
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in Frappe ERPNext 15.89.0 and earlier allows remote authenticated users to read database data. The get_dunning_letter_text method passes attacker-controlled Dunning Letter Text fields to frappe.render_template(), whose safe globals expose frappe.db.sql. Exploitation requires permission to configure Dunning Type content; injected Jinja expressions run server-side and can issue arbitrary SQL queries within the sandboxed context.

The record

CVE
CVE-2025-66434
Published
Dec 15, 2025
Updated
Dec 15, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1336, CWE-94, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-94Improper Control of Generation of Code ('Code Injection')
T1213Data from Information Repositories

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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