Description

Unauthenticated Broken Authentication in WP Event SOlution <= 4.1.9 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-08-06T15:17:20.340Z",
  "pubdate": "2026-08-06T15:17:20.340Z",
  "executiveSummary": "An unauthenticated broken authentication vulnerability has been identified in WP Event Solution versions <= 4.1.9. This security flaw exposes affected WordPress installations to unauthorized access risks, allowing unauthenticated threat actors to bypass standard authentication mechanisms entirely. The vulnerability impacts the core security controls of the WP Event Solution plugin, potentially leading to unauthorized privilege escalation, administrative action execution, and complete system compromise depending on the targeted environment.\nThe risk implications are severe, as exploitation requires no prior authentication, user interaction, or specialized privileges. Attackers can leverage network exposure to interact directly with vulnerable endpoints, executing arbitrary functionality restricted to authenticated users. Remediation is urgently required to prevent malicious exploitation and safeguard sensitive data managed by the plugin.",
  "technicalDetails": "The vulnerability resides in the authentication validation logic of WP Event Solution <= 4.1.9. Specifically, the vulnerable component fails to properly verify user credentials or session tokens during sensitive request handling, allowing unauthenticated actors to bypass security checks.\nRoot cause analysis indicates an insufficient implementation of access control checks and session validation within the plugin's request handling pipeline. Because the application processes requests without enforcing proper authentication state validation, an attacker can directly invoke restricted functions or forge requests that mimic authenticated sessions.\nThe attack flow proceeds as follows: First, the unauthenticated attacker identifies the vulnerable endpoints exposed by the WP Event Solution plugin over the network. Second, the attacker crafts a malicious HTTP request targeting these endpoints, omitting valid credentials or session tokens while exploiting the missing verification checks. Third, the plugin processes the incoming payload, incorrectly assuming a valid authorized context due to the absent validation logic. Finally, the server executes the requested actions, granting the attacker unauthorized access to privileged features, data retrieval, or administrative routines.\nExploitation is entirely unauthenticated and requires no specific privileges within the WordPress environment. The attack vector is network-based, leveraging HTTP/HTTPS requests sent directly to the vulnerable WordPress instance. Post-exploitation impact includes unauthorized data exposure, manipulation of event data, potential execution of administrative functions, and further compromise of the underlying WordPress installation."
}