CVE-2023-24597 in OX App Suite
Summary
by MITRE • 05/29/2023
OX App Suite before frontend 7.10.6-rev24 allows the loading (without user consent) of an e-mail message's remote resources during printing.
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Analysis
by VulDB Data Team • 10/22/2025
The vulnerability identified as CVE-2023-24597 affects OX App Suite versions prior to frontend 7.10.6-rev24, presenting a significant security risk during email printing operations. This flaw enables unauthorized loading of remote resources embedded within email messages when users attempt to print their content, creating a potential attack vector that bypasses normal user consent mechanisms. The issue stems from the application's handling of email rendering and printing functionality, where remote content is automatically fetched without explicit user approval.
The technical implementation of this vulnerability resides in the email message processing pipeline within the frontend component of OX App Suite. When users initiate the printing function, the system automatically resolves and loads external resources such as images, scripts, or other media referenced in the email content. This behavior occurs regardless of user intent or awareness, effectively creating a scenario where malicious actors can embed remote resources that execute code or establish connections to attacker-controlled servers. The flaw represents a failure in proper content sanitization and resource loading controls during print operations, allowing for automatic resource resolution without user interaction.
The operational impact of this vulnerability extends beyond simple privacy concerns to encompass potential security breaches and data exfiltration capabilities. Attackers can leverage this vulnerability to deliver malicious payloads through seemingly benign email messages, with the remote resources executing in the context of the user's browser or application environment. This creates opportunities for cross-site scripting attacks, credential theft, or the establishment of command and control channels. The vulnerability can be particularly dangerous in enterprise environments where users frequently print email communications and may not notice the automatic loading of external resources.
This vulnerability aligns with CWE-1004, which addresses insecure default configurations in software applications, and relates to ATT&CK technique T1566.001 for phishing attacks through email. The flaw enables attackers to conduct more sophisticated social engineering campaigns by embedding malicious resources that activate only during specific user actions like printing. Organizations should implement immediate mitigations including updating to the patched version 7.10.6-rev24, configuring strict content filtering policies, and educating users about the risks associated with email printing operations. Network-level controls such as DNS filtering and proxy configurations can provide additional defense layers, while monitoring for unusual outbound connections from email clients can help detect exploitation attempts.
The root cause of this vulnerability demonstrates a lack of proper input validation and resource loading controls within the email printing functionality. The application fails to distinguish between trusted and untrusted remote resources during print operations, implementing an overly permissive approach to external content resolution. This design flaw represents a classic example of insufficient privilege separation between user interfaces and external resource loading mechanisms, creating an attack surface that can be exploited without requiring elevated privileges or complex exploitation techniques. Organizations should conduct thorough security assessments of their email infrastructure to identify similar vulnerabilities in other components and ensure comprehensive patch management processes are in place to address such issues promptly.