The cookie authentication method in WordPress 2.5 relies on a hash of a concatenated string containing USERNAME and EXPIRY_TIME, which allows remote attackers to forge cookies by registering a username that results in the same concatenated string, as demonstrated by registering usernames beginning with admin to obtain administrator privileges, aka a cryptographic splicing issue. NOTE: this vulnerability exists because of an incomplete fix for CVE-2007-6013.
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Wordpress | Wordpress | 2.5 (including) | 2.5 (including) |
| Wordpress | Ubuntu | upstream | * |