CVE-2025-68523 identifies a missing authorization vulnerability in the Spiffy Calendar plugin developed by Spiffy Plugins, affecting versions up to and including 5.0.7. The core issue is an incorrectly configured access control mechanism that fails to properly enforce security levels, allowing unauthorized users to perform actions that should be restricted to authorized roles. This can lead to unauthorized viewing, modification, or deletion of calendar entries, potentially exposing sensitive scheduling information or disrupting organizational workflows. The vulnerability does not require authentication or user interaction, increasing its risk profile. Although no known exploits have been reported in the wild, the flaw presents a significant risk due to the widespread use of Spiffy Calendar in WordPress environments. The absence of a CVSS score necessitates an assessment based on impact and exploitability factors. The vulnerability compromises confidentiality and integrity by enabling unauthorized data access and modification, and availability could be affected if attackers disrupt calendar functionality. The plugin is commonly used in various organizational contexts, including corporate intranets and public-facing websites, making the scope of impact potentially broad. The vulnerability was published on December 24, 2025, with no patch links currently available, indicating that organizations should proactively review their access control settings and monitor for suspicious activity until an official fix is released.

For European organizations, the missing authorization vulnerability in Spiffy Calendar could lead to unauthorized access to sensitive scheduling information, potentially exposing confidential business meetings, employee schedules, or customer appointments. This exposure could facilitate further targeted attacks such as social engineering or espionage. Unauthorized modification or deletion of calendar entries could disrupt business operations, causing scheduling conflicts or loss of critical event data. Organizations relying on Spiffy Calendar for public event management may suffer reputational damage if attackers manipulate event information. The impact is particularly significant for sectors with strict data privacy requirements, such as finance, healthcare, and government agencies within Europe. Additionally, the ease of exploitation without authentication increases the risk of automated attacks or exploitation by low-skilled threat actors. The lack of known exploits currently provides a window for mitigation, but the potential for rapid weaponization exists once exploit code becomes available. Overall, the vulnerability threatens confidentiality, integrity, and availability of calendar data, which can have cascading effects on organizational productivity and security posture.

1. Immediately audit and review all access control configurations related to Spiffy Calendar to ensure that only authorized roles have permissions to view or modify calendar data. 2. Implement strict role-based access control (RBAC) policies within WordPress and the plugin settings to limit exposure. 3. Monitor logs for unusual or unauthorized access attempts to calendar functionalities, setting up alerts for suspicious activities. 4. Temporarily disable or restrict public access to calendar features if feasible until a patch is released. 5. Engage with Spiffy Plugins or trusted security sources to obtain or verify the availability of patches addressing CVE-2025-68523 and apply them promptly once released. 6. Conduct penetration testing focused on access control mechanisms within the affected plugin to identify any other potential weaknesses. 7. Educate administrators and users about the risks of unauthorized access and encourage prompt reporting of anomalies. 8. Consider deploying web application firewalls (WAFs) with custom rules to block unauthorized calendar-related requests. 9. Maintain up-to-date backups of calendar data to enable recovery in case of data tampering or loss. 10. Review and harden the overall WordPress environment to reduce the attack surface, including updating all plugins and core software regularly.