vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers methods when running on PHP 8.1 or later, as demonstrated by the /api.php?method=protectedMethod pattern, as exploited in the wild in May 2025.
Weakness
The product does not sufficiently protect all possible paths that a user can take to access restricted functionality or resources.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Vbulletin | Vbulletin | 5.0.0 (including) | 5.7.5 (including) |
| Vbulletin | Vbulletin | 6.0.0 (including) | 6.0.3 (including) |