Description

Subscriber Broken Authentication in Leyka <= 3.32.3 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.6",
  "pubDate": "2026-08-20T12:16:35.817Z",
  "pubdate": "2026-08-20T12:16:35.817Z",
  "executiveSummary": "A broken authentication vulnerability affects the Leyka plugin in versions <= 3.32.3. This security flaw allows unauthenticated or improperly verified threat actors to bypass standard authentication controls related to subscriber functionalities. The primary impact involves unauthorized access, potential data exposure, and integrity compromise within the affected system's subscriber management mechanism. The risk implications are significant for WordPress sites utilizing the vulnerable Leyka product, as unauthorized entities may leverage the flawed access controls to perform actions restricted to legitimate subscribers. The attacker capabilities include bypassing authentication boundaries without requiring valid user credentials, provided the target instance runs an affected version. Exploitation requirements rely entirely on the presence of the vulnerable code implementation within the subscriber module of the target Leyka installation. Due to the nature of broken authentication vulnerabilities in web applications, successful exploitation can lead to unauthorized data retrieval and potential manipulation of subscriber-level data, undermining the overall security posture of the hosting web application.",
  "technicalDetails": "The vulnerability resides within the authentication and authorization logic handling subscriber operations in Leyka versions <= 3.32.3. Specifically, the root cause stems from insufficient validation of user identity and missing cryptographic or session-based verification checks within the vulnerable component responsible for subscriber state management. When an incoming request interacts with the affected subscriber endpoints, the application fails to adequately verify whether the issuing entity possesses the necessary authorization tokens or legitimate session credentials.\nThe exploitation method involves sending specially crafted HTTP requests directly to the vulnerable application endpoints associated with subscriber functionalities. Because authentication enforcement is either absent or improperly implemented, the application processes the request as if it originated from a validated, authenticated subscriber. The attack flow proceeds as follows: first, the malicious actor identifies the exposed subscriber endpoints handled by the Leyka plugin; second, the attacker transmits a crafted payload bypassing the intended authentication workflow; third, the backend component processes the request without validating session parameters or user privileges; and finally, the system responds with unauthorized access to restricted functionalities or data structures.\nThe vulnerable component is instantiated within the subscriber handling modules of the Leyka plugin across all versions less than or equal to 3.32.3. The network exposure is remote, accessible via standard HTTP/HTTPS protocols exposed by the web server hosting the WordPress site. No specific privilege requirements or pre-existing authentication credentials are required by the attacker to initiate the exploitation sequence, as the flaw fundamentally undermines the authentication gate itself. Post-exploitation impact encompasses unauthorized exposure of sensitive subscriber records, potential injection or alteration of subscriber-level data, and unauthorized execution of restricted functions designed exclusively for verified users. The lack of strict access control checks allows malicious actors to interact with backend logic in an unintended manner, resulting in a complete failure of the authorization boundary."
}