CVE-2026-86182 in diem
Summary
by MITRE • 09/06/2026
A vulnerability was determined in diem-project diem up to 5.1.3. This affects the function executeCommand of the file dmAdminPlugin/modules/dmConsole/actions/actions.class.php of the component dmConsole. This manipulation of the argument dm_command causes cross-site request forgery. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 09/08/2026
The vulnerability identified in diem-project diem versions up to 5.1.3 represents a critical security flaw within the dmConsole component, specifically affecting the executeCommand function located in the file dmAdminPlugin/modules/dmConsole/actions/actions.class.php. This issue stems from an insufficient validation of input parameters, particularly the dm_command argument, which allows for cross-site request forgery attacks. Cross-site request forgery is a type of attack that forces an end user to execute unwanted actions on a web application in which they are currently authenticated. In this context, the manipulation of the dm_command parameter enables an attacker to craft malicious requests that appear legitimate to the server, thereby bypassing standard security measures such as same-origin policy checks and authentication tokens if not properly implemented or verified by the application logic.
From a technical perspective, the core flaw lies in the lack of robust verification mechanisms for state-changing operations initiated through the executeCommand function. When an authenticated user visits a maliciously crafted page controlled by an attacker, their browser may automatically include session cookies and other authentication credentials with the forged request to diem-project diem. Since the application fails to adequately validate that this request originated from its own trusted sources or includes valid anti-CSRF tokens specific to the action being performed, it processes the command as if it were a legitimate user-initiated action. This allows remote attackers to execute arbitrary commands within the administrative console of the affected system without direct interaction with the victim beyond tricking them into loading the malicious payload.
The operational impact of this vulnerability is significant due to its potential for remote exploitation and public availability of exploits. An attacker can leverage this flaw to perform unauthorized administrative actions, such as modifying configuration settings, accessing sensitive data, or executing further commands that could lead to full system compromise depending on the privileges associated with the compromised account. The fact that the exploit has been publicly disclosed increases the risk landscape considerably, as it lowers the barrier for entry for less sophisticated attackers who may utilize existing proof-of-concept code rather than developing new exploits from scratch. This situation is exacerbated by the project's lack of response to early issue reports, leaving users exposed without official patches or guidance on mitigation strategies provided directly by the maintainers.
In terms of industry standards and classification frameworks, this vulnerability aligns with CWE-352: Cross-Site Request Forgery (CSRF), which describes weaknesses in application logic where insufficient validation prevents unauthorized commands from being transmitted to a web application. Furthermore, within the MITRE ATT&CK framework, this behavior corresponds to techniques involving social engineering or automated exploitation via forged requests, often categorized under tactics like Execution or Persistence if the executed command leads to persistent access. The absence of proper anti-CSRF protections in administrative interfaces is a common oversight that highlights the need for rigorous input validation and state management practices during development cycles.
To mitigate this vulnerability, immediate defensive measures should be implemented by system administrators and developers who cannot rely on upstream patches due to the project's unresponsiveness. First, implementing strict CSRF token verification for all state-changing actions within the dmConsole component is essential. This involves generating unique, unpredictable tokens per session or request that must be validated server-side before executing any command. Additionally, enforcing same-site cookie attributes can help prevent browsers from sending cookies with cross-origin requests, thereby reducing the effectiveness of such attacks. Input validation should also be strengthened to ensure that only expected and safe values are accepted for the dm_command parameter, rejecting any malformed or unexpected inputs at the earliest possible stage in the request processing pipeline.
Long-term remediation requires a comprehensive review of the application's security architecture, particularly focusing on authentication mechanisms and session management policies. Developers should adopt secure coding practices that prioritize defense-in-depth strategies, including regular security audits and penetration testing to identify similar weaknesses across other components. Engaging with alternative supported frameworks or migrating away from unmaintained projects like diem-project diem may also be necessary to ensure ongoing protection against evolving threats. Until these measures are in place, organizations running affected versions must treat the dmConsole interface as potentially compromised and restrict access through network-level controls such as IP whitelisting or firewall rules that limit exposure to trusted internal networks only.