What are featuring in IBM's top ten of vulnerable that makes the report insinuate that the PHP language is a security risk are Jooma, Wordpress and Drupal. How PHP would feature in a list of "vendors" is beside the point.
He illustrates with an allegory that it's not the tool's fault if it's used improperly. Pointing out software like WordPress and Drupal is not the same as pointing out issues with the language that powers them (no matter how trendy it is). The burden is on the developers to use the power the language offers to create more secure, flexible, stable applications. Does PHP have its share of problems? Sure, but get it right next time CNet - don't blame the tool if the builder's not up to spec.