CVE-2024-31303 in Sign-up Sheets Plugin
Summary
by MITRE • 04/12/2024
Cross-Site Request Forgery (CSRF) vulnerability in Fetch Designs Sign-up Sheets sign-up-sheets.This issue affects Sign-up Sheets: from n/a through <= 2.2.11.1.
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Analysis
by VulDB Data Team • 04/01/2026
The Cross-Site Request Forgery vulnerability identified as CVE-2024-31303 resides within the Fetch Designs Sign-up Sheets plugin, specifically impacting versions ranging from an unspecified initial version through and including 2.2.11.1. This vulnerability represents a critical security flaw that undermines the integrity of web applications by exploiting the trust relationship between a web application and its users. The affected plugin operates within WordPress environments, making it susceptible to exploitation in widely deployed content management systems. The vulnerability manifests when the application fails to properly validate and verify the origin of HTTP requests, allowing malicious actors to execute unauthorized actions on behalf of authenticated users.
The technical flaw stems from insufficient CSRF protection mechanisms within the plugin's request handling processes. When users interact with the sign-up sheets functionality, the application should verify that requests originate from legitimate sources and contain valid authentication tokens. However, the vulnerability demonstrates a failure in implementing proper anti-CSRF token validation, leaving the system open to attack vectors where malicious actors can craft requests that appear to come from authenticated users. This weakness aligns with CWE-352, which specifically addresses Cross-Site Request Forgery vulnerabilities in web applications. The absence of robust token validation allows attackers to exploit the trust relationship between the user's browser and the web application, potentially enabling unauthorized modifications to sign-up sheet configurations or data.
The operational impact of this vulnerability extends beyond simple data manipulation, as it can compromise the entire integrity of the sign-up sheets functionality. Attackers could potentially modify existing sign-up sheets, create unauthorized entries, or manipulate user access permissions within the plugin's scope. The consequences are particularly concerning in environments where sign-up sheets are used for critical scheduling, resource allocation, or user management purposes. An attacker exploiting this vulnerability could disrupt organizational workflows, gain unauthorized access to sensitive scheduling information, or even escalate privileges within the WordPress environment. This vulnerability directly maps to several ATT&CK techniques including T1531 for Lateral Movement and T1078 for Valid Accounts, as it allows unauthorized access to authenticated user sessions and potentially broader system compromise.
Mitigation strategies for CVE-2024-31303 should prioritize immediate plugin updates to versions that address the CSRF vulnerability, as developers typically release patches that implement proper anti-CSRF token mechanisms. Organizations should also consider implementing additional security measures such as Content Security Policy headers, proper session management, and regular security audits of their WordPress installations. Network-level protections including web application firewalls and request validation rules can provide additional layers of defense against exploitation attempts. Security teams should also monitor for suspicious activities in their WordPress environments, particularly around sign-up sheet related actions, and implement proper logging and alerting mechanisms to detect potential exploitation attempts. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security practices and implementing robust validation controls for all web application components that handle user data or perform privileged operations.