Introduction
Attackers are actively compromising WordPress sites that run the Spirit Framework plugin, bypassing authentication and taking over administrator accounts. The vulnerability, tracked as CVE-2025-6388, affects thousands of educational and e-learning platforms that depend on the plugin for core features.
Spirit Framework is developed by Theme Spirit, a vendor that builds WordPress products for educational and e-learning sites. Its flagship Talemy theme and supporting plugins are used by many institutions and online course providers worldwide. Spirit Framework is a core component in many of those deployments, so a flaw in it hits the education sector especially hard.
Technical Information
CVE-2025-6388 is an authentication bypass in the Spirit Framework WordPress plugin, affecting all versions up to and including 1.2.14. The flaw lies in the custom_actions() function, which handles authentication logic outside WordPress's standard mechanisms. In these versions, custom_actions() does not properly validate a user's identity before it authenticates a request.
An unauthenticated attacker who knows a username can log in as that user, administrators included. The attacker sends a request that triggers custom_actions() and supplies a valid username. The function does not validate credentials, so it grants authentication tokens or session cookies anyway, and the request bypasses every standard WordPress authentication check.
The issue is classified as CWE-288 (Authentication Bypass Using an Alternate Path or Channel). It allows privilege escalation and full site takeover. No public code snippet is available. The root cause is the missing identity validation in the authentication logic of custom_actions().
Patch Information
The Spirit Framework developers fixed CVE-2025-6388 in version 1.2.15. The update adds stricter validation to the custom_actions() function, so a user's identity is properly authenticated before access is granted. With those checks in place, a request without valid credentials can no longer log in, which closes the path to account takeover and privilege escalation. Site administrators should update to version 1.2.15 immediately.
Affected Systems and Versions
- Product: Spirit Framework plugin for WordPress
- Affected versions: All versions up to and including 1.2.14
- Fixed in: 1.2.15
- Any WordPress installation with Spirit Framework <= 1.2.14 is vulnerable
Vendor Security History
Theme Spirit has had several security issues in its products. Earlier versions of Spirit Framework, up to 1.2.13, had a local file inclusion vulnerability. The vendor typically releases patches after public disclosure rather than proactively, and its security advisories and documentation say little about security best practices or mitigation.
