CVE-2026-81276 in Kali Forms Plugin
Summary
by MITRE • 08/27/2026
Unauthenticated Broken Access Control in Kali Forms <= 2.4.23 versions.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 08/27/2026
The vulnerability identified as an unbroken access control issue within Kali Forms versions prior to or equal to 2.4.23 represents a critical failure in the application's authorization logic, allowing attackers to perform actions without proper authentication credentials. This flaw stems from insufficient server-side validation of user permissions when handling requests directed at administrative endpoints or sensitive data structures. In many web applications built with frameworks like Laravel, which Kali Forms utilizes, access control is typically managed through middleware that checks if a user has the necessary roles and privileges before executing controller actions. However, in this specific instance, certain routes were either misconfigured to bypass these middleware protections entirely or lacked explicit authorization gates, effectively exposing administrative functionality to any internet-facing client regardless of their login status. This type of vulnerability is classically categorized under CWE-285 Improper Authorization, where the application fails to enforce proper access controls on resources for unauthorized actors.
The technical mechanism behind this exploitation involves direct manipulation of HTTP requests targeting specific API endpoints or admin pages that were not properly secured against unauthenticated access. An attacker can utilize standard web tools such as curl or Burp Suite to send crafted GET or POST requests directly to these unprotected routes. Because the application does not verify the session state, token validity, or role-based permissions for these particular actions, it processes the request as if it originated from a legitimate administrator. This allows the remote attacker to interact with features that are intended to be restricted, such as modifying system configurations, managing user accounts, or accessing sensitive database records. The absence of authentication checks creates a direct path for privilege escalation, effectively granting low-privilege users or anonymous attackers high-level administrative capabilities within the application environment.
The operational impact of this vulnerability is severe and multifaceted, potentially leading to complete compromise of the hosting system depending on how Kali Forms integrates with other services. An attacker can exploit this flaw to create new administrator accounts, thereby establishing persistent backdoor access that survives password changes or session timeouts for legitimate users. Furthermore, since administrative functions often include database management capabilities, there is a significant risk of data exfiltration where sensitive customer information, personal identifiable information, and proprietary business data could be stolen in bulk. Beyond confidentiality breaches, the attacker may also modify application settings to disrupt service availability, inject malicious scripts into forms leading to cross-site scripting attacks against end-users, or alter database structures causing denial of service conditions. This aligns with several tactics observed in the MITRE ATT&CK framework, particularly T1078 Valid Accounts for initial access via credential abuse and T1485 Data Destruction if the attacker chooses to delete critical data tables after gaining control.
Mitigation strategies must focus on immediate remediation of the authorization logic within the application codebase. The primary solution is to upgrade Kali Forms to version 2.4.23 or later, where these access control flaws have been addressed by developers through stricter middleware implementation and explicit role-based checks for all administrative routes. For organizations unable to patch immediately due to dependency constraints, temporary compensating controls should be implemented at the network perimeter level. Web Application Firewalls can be configured with rules that block direct requests to known vulnerable endpoints unless they originate from trusted internal IP ranges or include valid session tokens. Additionally, administrators should audit their server configurations to ensure that sensitive directories are not publicly accessible via directory listing and implement strict input validation on all forms to prevent secondary injection attacks that might accompany the initial access control bypass. Regular security audits using static application security testing tools can help identify similar misconfigurations in other parts of the codebase before they are exploited by malicious actors seeking unauthorized administrative privileges.