Numerous Plugins and Themes from the AccessPress Themes (aka Access Keys) vendor are backdoored due to their website being compromised. Only plugins and themes downloaded via the vendor website are affected, and those hosted on wordpress.org are not. However, all of them were updated or removed to avoid any confusion

PHP Jabbers Post Comment 3.0 allows remote attackers to bypass authentication and gain administrative access by setting the PostCommentsAdmin cookie to "logged."