CVE-2026-27760 Scanner

OpenCATS is an open-source applicant tracking system widely used by small to medium enterprises to manage their recruitment processes. It provides functionalities for managing job postings, candidates, and the hiring pipeline. The software is primarily designed for HR departments and recruiting teams to streamline communication and improve candidate experience. OpenCATS is utilized in various sectors due to its customizable features and ease of integration with existing systems. Enterprises favor it for its open-source model, allowing them to modify and adapt the software as per their specific business requirements. The main audience for OpenCATS includes HR professionals, recruitment agencies, and any organization seeking a cost-effective recruitment solution.

This vulnerability involves command injection, which allows unauthenticated attackers to execute arbitrary PHP code remotely on affected systems. The flaw exists prior to commit 3002a29 in OpenCATS and can lead to complete system compromise. Exploitation involves injecting PHP statements into the installer AJAX endpoint's databaseConnectivity action parameter. Unauthorized execution of code can significantly disrupt the application's integrity and potentially lead to unauthorized access to sensitive information. The vulnerability is particularly severe as it allows attackers to bypass authentication controls, making it a critical security concern for users.

The technical details of this vulnerability include the injection point at the endpoint /ajax.php with the parameter a=databaseConnectivity in the installer UI. Attackers can inject malicious code into this parameter during the installation process if the installation wizard is incomplete. The attack vector involves crafting a payload that will execute arbitrary code, leveraging the vulnerable position within the system's codebase. The flaw is exacerbated by a lack of control over input sanitization in the endpoint, allowing attackers to manipulate system behavior from a remote location. The attack does not require user interaction, increasing its risk profile.

If exploited, the vulnerability could lead to significant unauthorized access, potentially resulting in data breaches and manipulation of critical application functions. Attackers might gain full control of the system, including the ability to alter or delete data, install backdoors, or use the system as a launchpad for further attacks. The breach of confidentiality, integrity, and availability can have severe repercussions for an organization's reputation and operational stability. System downtime, loss of sensitive data, and subsequent financial or legal ramifications are possible outcomes of a successful exploit.

REFERENCES

• https://chocapikk.com/posts/2026/opencats-installer-rce/
• https://github.com/opencats/OpenCATS/commit/3002a29f4c3cada1aa2c4f3d4ae4e189906606b6
• https://github.com/opencats/OpenCATS
• https://nvd.nist.gov/vuln/detail/CVE-2026-27760