CVE-2026-71624 in esoTalk
Summary
by MITRE • 09/04/2026
An issue in esoTalk v.1.0.0g4 allows a remote attacker to execute arbitrary code via the core/models/ETMemberModel.class.php, core/controllers/ETMemberController.class.php, and core/lib/ET.class.php components
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Analysis
by VulDB Data Team • 09/04/2026
The vulnerability identified in eSofa Talk version 1.0.0g4 represents a critical security flaw rooted in insufficient input validation within the application's core architecture. This issue specifically affects three primary components: ETMemberModel.class.php, ETMemberController.class.php, and ET.class.php. These files are integral to handling user data processing and session management logic. The presence of this vulnerability allows a remote attacker to execute arbitrary code on the target server by exploiting weaknesses in how these modules process incoming requests without adequate sanitization or type checking mechanisms.
From a technical perspective, the flaw likely stems from improper deserialization practices or insufficient escaping of special characters within user-supplied input fields that are processed by the mentioned PHP files. When an attacker crafts a malicious payload and submits it through any interface accessible to unauthenticated users or those with lower privilege levels, the application fails to distinguish between legitimate data structures and executable code fragments. This failure enables the injection of arbitrary commands into the server environment. The involvement of ETMemberModel.class.php suggests that user profile attributes or authentication tokens might be manipulated, while ETMemberController.class.php indicates potential exploitation through API endpoints or web form submissions related to member actions. Furthermore, the inclusion of ET.class.php implies that global utility functions responsible for core operations are also susceptible to this injection technique, potentially affecting broader system stability and security posture.
The operational impact of successful code execution is severe and multifaceted. An attacker who exploits this vulnerability gains the ability to run arbitrary commands with the same privileges as the web server process. This typically translates into full compromise of the underlying operating system hosting eSofa Talk. Consequences include unauthorized access to sensitive user data, modification or deletion of database records, installation of backdoors for persistent access, and use of the compromised host as a pivot point for further attacks against internal network resources. In many cases, this leads directly to complete loss of confidentiality, integrity, and availability for the affected application and potentially adjacent systems if lateral movement is possible due to weak segmentation or shared credentials.
This vulnerability aligns with Common Weakness Enumeration (CWE) categories such as CWE-94 Improper Control of Generation of Code ('Code Injection') and potentially CWE-502 Deserialization of Untrusted Data, depending on the specific mechanism exploited within the PHP environment. In terms of the MITRE ATT&CK framework, this behavior corresponds to techniques involving Remote Code Execution (T1059) and Command Line Interface usage for post-exploitation activities. The attack vector is classified as remote, meaning it can be leveraged over a network without requiring prior authentication or physical access, significantly increasing its risk profile in internet-facing deployments.
Mitigation strategies must address both immediate remediation and long-term security hardening. The most effective solution is to apply the official patch provided by eSofa Talk developers if available for version 1.0.0g4 or upgrade to a newer, secure release where these input validation flaws have been resolved. If upgrading is not immediately feasible, administrators should implement strict web application firewall rules that detect and block common code injection patterns in HTTP requests targeting the identified PHP files. Additionally, enabling comprehensive logging and monitoring for anomalous activity related to member controllers and model operations can aid in early detection of exploitation attempts. It is also advisable to review server configurations to ensure the web service runs with minimal privileges, limiting the potential damage even if an exploit succeeds. Regular security audits focusing on input validation across all user-facing endpoints are essential to prevent similar vulnerabilities from being introduced or overlooked in future updates.