Launchpad.net

CVE 2007-4282

The "Extended properties for entries" (entryproperties) plugin in serendipity_event_entryproperties.php in Serendipity 1.1.3 allows remote authenticated users to bypass password protection and "deliver custom entryproperties settings to the Serendipity Frontend" via a certain request that modifies the password being checked.

See the CVE page on Mitre.org for more details.