A hacker with the handle Marsu posted both exploits to the Milw0rm website.

The most recently discovered vulnerability exists in Photoshop versions CS2 and CS3 and Photoshop Elements version 5. The flaw is caused by a boundary error within the PNG.8BI Photoshop Format Plugin when handling PNG files, according to a Secunia advisory.

The flaw was ranked "highly critical" by Secunia.

SC Magazine