CVE-2024-30528 in Spiffy Calendar Plugin
Summary
by MITRE • 06/04/2024
Missing Authorization vulnerability in Spiffy Plugins Spiffy Calendar.This issue affects Spiffy Calendar: from n/a through 4.9.10.
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Analysis
by VulDB Data Team • 06/12/2024
The vulnerability identified as CVE-2024-30528 represents a critical missing authorization flaw within the Spiffy Calendar plugin developed by Spiffy Plugins. This weakness allows unauthorized users to bypass intended access controls and perform actions they should not be permitted to execute. The vulnerability exists across all versions of the plugin from the initial release through version 4.9.10, indicating a prolonged period during which the security flaw remained unaddressed. The issue stems from inadequate validation of user permissions and roles within the plugin's codebase, creating opportunities for privilege escalation and unauthorized modifications to calendar data and settings.
From a technical perspective, this missing authorization vulnerability manifests when the plugin fails to properly verify whether the currently authenticated user possesses the necessary privileges to execute specific functions. The flaw likely occurs in the plugin's backend processing logic where access control checks are either absent or improperly implemented. Attackers can exploit this weakness to manipulate calendar events, modify scheduling configurations, or access sensitive calendar data that should be restricted to authorized administrators or users. The vulnerability directly maps to CWE-863, which describes "Incorrect Authorization" where a system fails to properly enforce access control mechanisms. This misconfiguration allows attackers to perform unauthorized operations that should be restricted based on user roles and permissions.
The operational impact of this vulnerability extends beyond simple data exposure, potentially enabling attackers to disrupt calendar services, manipulate scheduling information, or gain unauthorized access to sensitive organizational data. Calendar systems often contain time-sensitive information, meeting schedules, and personal details that could be exploited for social engineering attacks or business disruption. The vulnerability affects any user who can access the WordPress site, regardless of their role, making it particularly dangerous in multi-user environments where different permission levels should be enforced. Attackers could leverage this flaw to escalate privileges within the calendar plugin, potentially leading to broader system compromise or data manipulation that could affect business operations and user trust.
Security mitigation strategies should focus on immediate plugin updates to version 4.9.11 or later, which contain the necessary authorization fixes. Administrators should also implement additional monitoring of calendar-related activities and user access patterns to detect potential exploitation attempts. The remediation process involves verifying that all user interactions with the calendar plugin are properly authenticated and authorized through robust access control mechanisms. Organizations should conduct comprehensive security assessments of their WordPress installations to identify similar authorization flaws in other plugins and themes. This vulnerability highlights the importance of implementing proper authorization checks and following security best practices such as the principle of least privilege, where users are granted only the minimum permissions necessary to perform their functions. The ATT&CK framework categorizes this type of vulnerability under privilege escalation techniques, where adversaries seek to gain elevated permissions within a system to access restricted resources or perform unauthorized actions. Regular security audits and vulnerability assessments remain essential to identifying and addressing such authorization gaps before they can be exploited by malicious actors.