CVE-2025-13136 in GSheetConnector for Ninja Forms Plugin
Summary
by MITRE • 11/22/2025
The GSheetConnector For Ninja Forms plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the 'njform-google-sheet-config ' page in all versions up to, and including, 2.0.1. This makes it possible for authenticated attackers, with Subscriber-level access and above, to retrieve information about the system.
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Analysis
by VulDB Data Team • 11/22/2025
The vulnerability identified as CVE-2025-13136 affects the GSheetConnector For Ninja Forms plugin version 2.0.1 and earlier, presenting a critical authorization flaw that undermines the security posture of WordPress installations. This issue stems from an insufficient capability check within the plugin's administrative interface, specifically on the 'njform-google-sheet-config' page. The flaw allows authenticated users with subscriber-level permissions or higher to access sensitive configuration data that should be restricted to administrators only. The vulnerability represents a direct violation of the principle of least privilege, where users possess more access rights than necessary for their role within the system.
The technical implementation of this vulnerability resides in the plugin's lack of proper access control validation when processing requests to the Google Sheet configuration page. Without adequate capability checks, the plugin fails to verify whether the requesting user possesses sufficient privileges to access the sensitive data being exposed. This missing authorization mechanism creates an attack surface where malicious actors with low-privilege accounts can escalate their access and gather information about the plugin's configuration, potentially including Google API credentials, sheet identifiers, and other system integration details. The vulnerability is classified under CWE-284, which addresses improper access control in software systems, and aligns with ATT&CK technique T1078.101 which covers valid accounts with privileges to access systems.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with valuable reconnaissance data that could facilitate further exploitation attempts. An attacker with subscriber-level access could potentially gather enough information to craft more sophisticated attacks against the WordPress installation, including identifying other vulnerable components, understanding the system architecture, or planning targeted attacks against specific plugin functionalities. The exposure of Google Sheet configuration details could also lead to unauthorized data access through the connected Google Sheets, potentially compromising sensitive information stored in those documents. This vulnerability particularly affects WordPress sites that rely heavily on form integrations and third-party data connections, making it a significant concern for organizations handling confidential data.
Mitigation strategies for this vulnerability should focus on immediate remediation through plugin updates to versions that include proper capability checks and authorization controls. System administrators should ensure that all WordPress plugins are kept current with the latest security patches and that regular security audits are conducted to identify similar authorization flaws. The recommended approach involves implementing robust access control mechanisms that verify user capabilities before granting access to sensitive administrative functions. Organizations should also consider implementing network segmentation and monitoring solutions to detect unauthorized access attempts to administrative interfaces. Additionally, regular security training for users and administrators helps prevent privilege escalation through social engineering or compromised accounts. The fix for this vulnerability should include comprehensive capability validation that ensures only users with appropriate administrative privileges can access the Google Sheet configuration page, thereby preventing unauthorized information disclosure and maintaining the integrity of the WordPress installation's security model.