CVE-2025-5821 Case Theme User <= 1.0.3 - Authentication Bypass via Social Login
Unauthenticated attackers can bypass authentication to log in as administrators using social login flaws, requiring only an existing account and admin email access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-5821?
CVE-2025-5821 is a critical authentication bypass vulnerability in Case-Themes Case Theme User, published on 23 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Case Theme User plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 1.0.3. This is due to the plugin not properly logging in a user with the data that was previously verified through the facebook_ajax_login_callback() function. This makes it possible for unauthenticated attackers to log in as administrative users, as long as they have an existing account on the site which can easily be created by default through the temp user functionality, and access to the administrative user's email.
Weakness: CWE-288
Which versions are affected by CVE-2025-5821?
How do I fix CVE-2025-5821?
No fix has been published for CVE-2025-5821 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-5821 being exploited?
There is no known exploitation of CVE-2025-5821 in the wild and no public exploit code.
Sources
Also known as GHSA-8v37-q45v-wgrx.