CVE-2008-1930: WordPress

High severity, CVSS 7.5. EPSS: 5% chance of exploitation in the next 30 days.

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.

Affected products

• WordPress WordPress: version 2.5 only

Published 2008-04-28. Last modified 2026-06-16.