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CVE-2026-81805 – Unauthenticated Privilege Escalation – SiteSkite WordPress Plugin ≤ 2.1.5

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Summary

CVE-2026-81805 is an unauthenticated privilege escalation vulnerability in the SiteSkite WordPress plugin, a remote site-management and AI/MCP connector tool for WordPress. The flaw stems from incorrect privilege assignment (CWE-266) and allows an attacker with no prior authentication to escalate privileges on an affected site. The issue carries a CVSS v3.1 base score of 8.1 (High) and affects all SiteSkite versions up to and including 2.1.5.

Technical details

  • Root cause: The plugin incorrectly assigns or validates user privileges (CWE-266) in one or more of its remote management/administrative code paths, allowing a request that should require authentication and elevated rights to instead succeed without proper authorization checks.
  • Trigger conditions: An attacker sends a crafted request to a vulnerable SiteSkite endpoint on a site running version 2.1.5 or earlier. No valid credentials or prior user interaction are required, though the attack complexity is rated High (AC:H), indicating some non-trivial conditions or timing must be met to succeed.
  • Attack vector: Network (AV:N) — exploitable remotely over HTTP/HTTPS against the WordPress installation without authentication (PR:N) or user interaction (UI:N).
  • Impact: Successful exploitation results in a full compromise of confidentiality, integrity, and availability (C:H/I:H/A:H) of the affected WordPress site, potentially granting the attacker administrative-level control, including the ability to read, modify, or destroy site data and content.

Affected software

  • SiteSkite (WordPress plugin, including "SiteSkite MCP AI" connector for Claude, ChatGPT, Cursor & WordPress WebOps) — versions up to and including 2.1.5
  • Fixed in version 2.1.6 and later

Severity

  • CVSS v3.1 Base Score: 8.1 (High)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update the SiteSkite plugin to version 2.1.6 or later, which includes hardened security practices for the plugin’s remote management functionality and resolves the underlying privilege-assignment flaw.
  • If immediate patching is not possible:
    • Restrict or disable remote management/API functionality exposed by SiteSkite until the update can be applied.
    • Limit direct internet exposure of WordPress admin and plugin-specific endpoints via a web application firewall or IP allow-listing.
    • Monitor site user accounts and role assignments for unexpected privilege changes or newly created administrative users.
    • Review site logs for anomalous requests to SiteSkite-related endpoints predating the patch.

References

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