CVE-2026-77881 in Control Web Panel
Summary
by MITRE • 11/02/2026
Control Web Panel (CWP) before webpanel_version 1.30 contains a blind SQL injection vulnerability in an unauthenticated loopback API route that connects to MySQL as root, where the 'user' parameter is interpolated directly into a query against the oauth_clients table. Attackers can send crafted requests to the unauthenticated route (originally /user_panel_dashboard/, later /valid_token/) to perform time-based blind SQL injection and extract arbitrary database contents.
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Analysis
by VulDB Data Team • 11/02/2026
The vulnerability identified in Control Web Panel versions prior to 1.30 represents a critical security flaw rooted in improper input validation within an unauthenticated API endpoint. This specific weakness allows for blind Structured Query Language injection, a category of attack where the attacker infers database contents based on the application's response time or behavior rather than direct output. The affected component is a loopback API route that was originally accessible at /user_panel_dashboard/ and later moved to /valid_token/. Despite being intended for internal communication between services, this endpoint lacks proper authentication checks, effectively exposing it to any process with network access on the local machine, including potentially compromised web applications or scripts.
At the technical core of this vulnerability is the direct interpolation of the user parameter into a SQL query targeting the oauth_clients table without adequate sanitization or parameterized queries. In secure software development practices, all user-supplied input must be treated as untrusted and processed through strict validation filters or prepared statements to prevent code injection. Here, the application constructs a dynamic SQL string by concatenating the raw value of the user parameter directly into the query structure. This design flaw enables an attacker to inject malicious SQL syntax that alters the logic of the original query. Because the vulnerability is classified as blind, it does not return data directly in the HTTP response but instead allows for time-based extraction techniques where specific payloads cause measurable delays if certain conditions are met, thereby revealing information about the database schema and contents bit by bit.
The operational impact of this flaw is severe due to the privileges associated with the database connection used by the API route. The service connects to MySQL using the root account, which possesses unrestricted administrative rights over all databases on the server. By exploiting this blind SQL injection, an attacker can extract arbitrary data from the oauth_clients table and potentially other tables if they can enumerate them through error-based or time-based techniques. This could lead to the compromise of authentication tokens, user credentials stored within the OAuth infrastructure, and sensitive configuration details. Furthermore, given that MySQL root access is often linked to operating system-level privileges via specific configurations like mysql.sys or UDFs, there exists a theoretical risk of escalating from database extraction to remote code execution on the host server, although this depends heavily on the specific environment setup and security hardening measures in place.
From an industry standards perspective, this vulnerability aligns with CWE-89 Improper Neutralization of Special Elements used in an SQL Command, commonly known as SQL Injection. The lack of authentication for a sensitive administrative endpoint also reflects weaknesses associated with CWE-287 Improper Authentication and CWE-434 Unrestricted Upload or File Download if file operations were involved, though the primary vector here is data exfiltration via injection. In terms of tactical mapping within the MITRE ATT&CK framework, this exploit falls under T1190 Exploit Public-Facing Application for initial access and potentially T1078 Valid Accounts if the attacker leverages extracted credentials to maintain persistence or move laterally within the network environment. The use of time-based blind techniques specifically relates to data exfiltration methods where indirect channels are used to bypass output restrictions.
To mitigate this vulnerability, administrators must immediately upgrade Control Web Panel to version 1.30 or any subsequent release that addresses this issue by implementing proper input validation and parameterized queries for all database interactions. It is critical to ensure that the API endpoints do not rely on implicit trust from loopback interfaces without explicit authentication mechanisms such as shared secrets or token-based verification. Additionally, applying the principle of least privilege to database accounts used by web applications can significantly reduce the blast radius if an injection occurs; using a dedicated user with restricted permissions rather than root would prevent attackers from accessing sensitive system tables or executing administrative commands even if they successfully inject SQL code. Regular security audits and static application security testing should be employed to detect similar patterns of dynamic query construction in other parts of the software stack before deployment.