CVE-2026-107130 in Gridbox Extension
Summary
by MITRE • 11/05/2026
Joomla Extension - balbooa.com - Unauthenticated deletion of submission/field files in Gridbox < 2.20.5.0
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Analysis
by VulDB Data Team • 11/05/2026
The vulnerability identified in the Joomla extension Gridbox, specifically affecting versions prior to 2.20.5.0 published by Balbooa.com, represents a critical security flaw rooted in insufficient access control mechanisms within the application's file handling subsystems. This unauthenticated deletion of submission and field files allows any remote attacker with network connectivity to the target Joomla instance to permanently remove data without requiring valid credentials or authentication tokens. The core technical issue lies in the failure to properly validate user permissions before executing destructive operations on server-side storage, a classic example of an insecure direct object reference combined with broken access control principles as defined by industry standards such as CWE-264 and CWE-732.
From a technical perspective, the vulnerability exploits weaknesses in how Gridbox processes requests related to file management for form submissions and custom fields. When a user interacts with forms or field configurations within the Joomla backend or potentially through exposed frontend endpoints depending on configuration, the application fails to verify that the requesting entity has administrative privileges or ownership of the specific resource being targeted. This lack of server-side authorization checks enables an attacker to craft malicious HTTP requests that invoke internal functions responsible for deleting files associated with user submissions and field data structures. The absence of anti-CSRF protections further exacerbates this risk, allowing attackers to potentially trigger these deletions via cross-site request forgery attacks if the victim is logged into a privileged session in their browser.
The operational impact of this vulnerability is severe, primarily centering on data integrity loss and potential denial of service conditions for legitimate users relying on form submissions or field-based content management. By deleting submission files, attackers can erase critical user-generated content such as contact forms, registration details, survey responses, or transaction records stored within the Joomla database's associated file structures. This destruction of data undermines trust in the platform and may lead to significant business disruption for organizations dependent on these inputs for operations or compliance reporting. Furthermore, if sensitive personal information is contained within these deleted files, it could result in regulatory non-compliance under frameworks like GDPR due to the loss of audit trails and user consent records, although this specific vulnerability focuses more on availability and integrity rather than confidentiality leakage directly.
In terms of threat modeling, this flaw aligns with MITRE ATT&CK techniques related to Impact actions where adversaries manipulate or destroy data to hinder organizational operations. Specifically, it reflects behaviors associated with Data Destruction tactics which aim to render systems unusable by removing essential components. The unauthenticated nature of the attack means that even users without any prior access level can contribute to this disruption, making it a high-severity issue for public-facing Joomla sites running vulnerable versions of Gridbox. Attackers do not need complex exploitation chains or privilege escalation steps; they simply require knowledge of the target URL structure and basic web request capabilities to execute successful deletion payloads against exposed endpoints.
Mitigation strategies must prioritize immediate patching as the primary defense vector. Administrators should upgrade the Gridbox extension to version 2.20.5.0 or later, where Balbooa has implemented proper access control checks ensuring that only authenticated users with appropriate roles can perform file deletion operations. Until patches are applied, temporary mitigations include restricting access to Joomla administrative areas via IP whitelisting if feasible and disabling public-facing form submissions until the vulnerability is resolved. Additionally, implementing robust web application firewall rules can help detect and block anomalous patterns of bulk deletions or unauthorized API calls targeting gridbox-specific endpoints. Regular backups should be maintained to facilitate rapid recovery from any successful exploitation attempts, ensuring business continuity despite potential security breaches in third-party extensions.