CVE-2026-1983: 
WordPress vulnerability analysis and mitigation

CVE-2026-1983 is a Cross-Site Request Forgery (CSRF) vulnerability in the SEATT: Simple Event Attendance plugin for WordPress. It affects all versions up to and including 1.5.0, stemming from missing nonce validation on the event deletion functionality. The vulnerability was published on February 14, 2026, and carries a CVSS v3.1 base score of 4.3 (Medium) (Feedly).

The root cause is classified as CWE-352 (Cross-Site Request Forgery), specifically the absence of nonce validation on the event deletion endpoint within the SEATT plugin. An unauthenticated attacker can craft a malicious HTTP request that, when triggered by an authenticated administrator (e.g., via a deceptive link or embedded iframe), causes the server to delete arbitrary events without verifying the request's legitimacy. Exploitation requires social engineering to trick an administrator into performing an action, such as clicking a crafted link (Feedly, InfinitSec).

Successful exploitation allows an unauthenticated attacker to delete arbitrary events managed by the SEATT plugin on a WordPress site, resulting in a low integrity impact with no confidentiality or availability impact. The scope is limited to the plugin's event data, and there is no evidence of lateral movement potential or sensitive data exposure beyond the loss of event records (Feedly).

No public exploit code or active in-the-wild exploitation has been reported for CVE-2026-1983. The EPSS score is approximately 0.012% (0.000120), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, and no threat actor attribution has been identified (Feedly).

1. Reconnaissance: Identify WordPress sites running the SEATT: Simple Event Attendance plugin version 1.5.0 or earlier, using tools like WPScan or manual inspection of plugin directories.
2. Craft malicious request: Construct a forged HTTP GET or POST request targeting the event deletion endpoint (e.g., the admin-post action for deleting events) without a valid nonce parameter.
3. Deliver payload: Embed the forged request in a malicious link, image tag, or hidden form on an attacker-controlled page, then socially engineer a logged-in WordPress administrator into visiting that page or clicking the link.
4. Trigger deletion: When the administrator's browser automatically sends the forged request with their authenticated session cookies, the server processes the deletion without nonce verification, removing the targeted event(s) from the WordPress database (Feedly, InfinitSec).

• Logs: WordPress access logs showing unexpected POST or GET requests to admin-post or admin-ajax endpoints associated with SEATT event deletion actions, originating from unusual referrers or external domains.
• Application: Unexplained disappearance of events in the SEATT plugin dashboard without corresponding administrator activity in WordPress audit logs.
• Network: Requests to WordPress admin endpoints from IP addresses not associated with known administrators, particularly with referrer headers pointing to external or unknown sites.

WordPress site administrators should update the SEATT: Simple Event Attendance plugin to a version beyond 1.5.0 that includes proper nonce validation on event deletion functionality. Until a patched version is available, consider disabling the plugin or restricting access to the WordPress admin area via IP allowlisting. Additionally, implementing a Web Application Firewall (WAF) with CSRF protection rules can help mitigate exploitation risk (Feedly).