Description

Subscriber Privilege Escalation in JobZilla - Job Board WordPress Theme <= 2.2 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.8",
  "pubDate": "2026-10-06T09:17:50.200Z",
  "pubdate": "2026-10-06T09:17:50.200Z",
  "executiveSummary": "The JobZilla Job Board WordPress Theme, in versions 2.2 and earlier, is susceptible to a privilege escalation vulnerability.\nThis vulnerability allows authenticated users with low-level subscriber privileges to perform unauthorized actions, potentially escalating their account permissions or modifying application settings.\nThe flaw stems from insufficient input validation and improper authorization checks within the theme's backend functionality.\nAn attacker with a standard subscriber account can leverage this security gap to interact with administrative-level functions, leading to complete site compromise or unauthorized administrative control.\nThis vulnerability is critical for environments allowing user registration, as it bypasses the principle of least privilege, enabling malicious actors to manipulate core theme configuration and user management interfaces.\nExploitation requires an active, authenticated subscriber session, but it does not require higher-level privileges, making it a significant risk to the integrity and availability of the affected WordPress installation.",
  "technicalDetails": "The vulnerability resides within the authentication and authorization handling mechanisms of the JobZilla theme. The root cause is the failure to implement robust nonce verification and capability checks (e.g., current_user_can()) on sensitive administrative endpoints or AJAX handler functions.\nBy failing to validate that the request originates from an authorized administrator, the theme implicitly trusts input submitted from any authenticated user.\nAn attacker can exploit this by crafting malicious HTTP requests directed at the theme's administrative AJAX endpoints or internal processing functions. Because the theme lacks sufficient backend access control, it processes these requests as if they were initiated by an authorized administrator.\nThe attack flow follows a sequential process: 1) The attacker authenticates as a standard subscriber to establish a valid session. 2) The attacker intercepts or reconstructs a request associated with administrative actions (such as user account modifications, theme settings updates, or internal configuration changes). 3) The attacker modifies the request payload to target specific sensitive functions. 4) The server processes the forged request, executing administrative-level code under the context of the user session, effectively escalating privileges or executing unauthorized commands.\nThe vulnerable component is likely contained within the theme's primary administrative controllers or AJAX event hooks. The lack of strict authorization protocols allows for horizontal and vertical privilege escalation, where the subscriber can manipulate data structures meant to be guarded by higher-level roles.\nPost-exploitation impact includes the ability to create new administrator accounts, inject malicious code into the site's database, or reconfigure global theme settings. This could lead to a full site takeover, unauthorized exfiltration of site data, or the redirection of site traffic to malicious external domains. Since the vulnerability is located within the theme code, the compromise is specific to the WordPress instance utilizing the JobZilla theme version 2.2 or lower. No specialized network exposure is required beyond standard web access, as the vulnerability is triggered through expected HTTP/HTTPS request vectors already available to registered users."
}