CVE-2024-8700 is a high-severity vulnerability affecting the Event Calendar WordPress plugin versions through 1.0.4. The core issue is an improper access control flaw (CWE-284) where the plugin fails to verify authorization on delete actions. This allows unauthenticated attackers to delete arbitrary calendar entries without any authentication or user interaction. The vulnerability is remotely exploitable over the network (AV:N), requires no privileges (PR:N), and no user interaction (UI:N), making it highly accessible to attackers. The impact is primarily on integrity, as attackers can remove calendar data, potentially disrupting event management and scheduling on affected WordPress sites. Availability and confidentiality are not directly impacted. There are no known exploits in the wild yet, and no patches have been linked or published at the time of this report. The vulnerability was reserved in September 2024 and published in May 2025. The CVSS 3.1 base score is 7.5, reflecting the ease of exploitation and significant impact on data integrity. The lack of authorization checks indicates a fundamental design flaw in the plugin's access control mechanisms, which could be leveraged to cause operational disruption or targeted sabotage of event data on vulnerable sites.

For European organizations using the Event Calendar WordPress plugin, this vulnerability poses a significant risk to the integrity of event data. Organizations relying on these calendars for internal scheduling, public event announcements, or customer engagement could face disruptions if attackers delete critical calendar entries. This could lead to operational inefficiencies, loss of trust from customers or partners, and potential reputational damage. Sectors such as education, public administration, event management companies, and cultural institutions that heavily depend on accurate event scheduling are particularly vulnerable. Although the vulnerability does not directly affect confidentiality or availability, the loss or manipulation of calendar data can indirectly impact business continuity and stakeholder communication. Given the ease of exploitation without authentication, attackers could automate deletion attacks at scale, amplifying the impact across multiple affected sites.

Immediate mitigation should focus on restricting access to the delete functionality within the Event Calendar plugin. Administrators should: 1) Temporarily disable or restrict the plugin's delete actions via web application firewalls (WAFs) or security plugins that can enforce access control rules. 2) Monitor web server logs for suspicious delete requests targeting calendar endpoints to detect potential exploitation attempts. 3) Implement strict role-based access controls (RBAC) at the WordPress level to limit plugin management capabilities to trusted users only. 4) Regularly back up calendar data to enable quick restoration in case of deletion. 5) Stay alert for official patches or updates from the plugin vendor or WordPress security teams and apply them promptly once available. 6) Consider isolating or sandboxing the plugin functionality if possible to minimize impact. 7) Employ security headers and anti-CSRF tokens if applicable to reduce unauthorized requests. These steps go beyond generic advice by focusing on immediate containment, detection, and recovery strategies tailored to this specific plugin vulnerability.