CVE-2023-54411 in Frappe
Summary
by MITRE • 10/13/2026
Frappe framework before 13.32.0 uses weak authentication for print view access, because the print view key can be derived from data exposed by other whitelisted API endpoints. Attackers can generate a valid key to view documents through the print view without proper permissions.
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Analysis
by VulDB Data Team • 10/13/2026
The Frappe framework, prior to version 13.32.0, contains a critical authentication bypass vulnerability within its document printing mechanism that allows unauthorized users to access sensitive information. This flaw stems from an insecure design in how the system generates and validates keys for accessing print views of documents. In typical web applications utilizing frameworks like Frappe, certain actions such as generating PDFs or printable versions of records require specific tokens or keys to ensure that only authorized personnel can initiate these operations. However, in this vulnerable version, the cryptographic key required to access the print view is not generated using a secure random source independent of user session data. Instead, it relies on deterministic logic based on information already exposed through other whitelisted API endpoints. This architectural oversight means that an attacker does not need valid credentials for the specific document or even full administrative privileges; they only need to interact with publicly accessible or low-privilege APIs to gather sufficient entropy to reconstruct the necessary authentication token.
From a technical perspective, this vulnerability represents a classic case of insecure direct object references combined with weak cryptographic key generation. The core issue lies in the predictability of the print view key. When an application exposes data through whitelisted endpoints, it often includes identifiers such as document IDs, user session tokens, or timestamps that can be used to seed pseudo-random number generators. If the framework uses these exposed values to derive the print access key without adding sufficient independent randomness or salt, an attacker can reverse-engineer the generation process. By observing the output of legitimate API calls and understanding the underlying algorithmic structure, a malicious actor can calculate the exact key needed to bypass the authentication check on the print endpoint. This effectively neutralizes the intended security controls because the barrier to entry is reduced from complex credential theft or privilege escalation to simple data observation and calculation.
The operational impact of this vulnerability is significant for any organization relying on Frappe for managing sensitive business records, such as customer personal information, financial transactions, or internal corporate documents. Since print views often contain formatted versions of raw database entries, including fields that might be hidden in the standard UI but are still present in the underlying data structure, unauthorized access can lead to substantial data leakage. Attackers can systematically enumerate document IDs using other exposed APIs and then generate valid print keys for each one. This allows them to download comprehensive reports or individual records without triggering typical intrusion detection systems associated with brute-force attacks or invalid login attempts. The ease of exploitation means that even users with minimal permissions, such as standard employees who have access to basic record lists, could potentially escalate their capabilities to view confidential details belonging to other departments or higher-level management if the framework does not enforce strict row-level security checks alongside this flawed authentication mechanism.
This vulnerability aligns closely with CWE-347, Improper Verification of Cryptographic Signature, as well as CWE-614, Sensitive Cookie in HTTPS Session Without Strict HttpOnly Flag, depending on how the key is transmitted and stored. In terms of attack vectors, it relates to ATT&CK technique T1078, Valid Accounts, specifically through credential access via information discovery rather than direct theft. The attacker leverages legitimate API interactions to gather intelligence that facilitates unauthorized access. To mitigate this risk, organizations must upgrade immediately to Frappe version 13.32.0 or later where the print view key generation has been hardened with cryptographically secure random number generators independent of exposed session data. Additionally, developers should implement strict row-level permissions at the database level rather than relying solely on application-layer authentication for sensitive fields. It is also advisable to audit all whitelisted API endpoints to ensure they do not expose unnecessary metadata that could aid in cryptographic analysis or enumeration attacks. Regular security assessments and penetration testing focusing on IDOR (Insecure Direct Object Reference) patterns are recommended to identify similar weaknesses in custom applications built upon the framework.