The leak saw names including Jennifer Lawrence, Cara Delevigne, Lea Michele, Kim Kardashian, Selena Gomez, Vanessa Hudgens and Kate Upton linked to the list of around 100 famous people whose intimate pictures had reportedly been posted online.Initial reports concluded that Apple's iCloud service had been compromised to access the images.The technology giant also confirmed it is looking into it.Spokeswoman Natalie Kerris said: "We take user privacy very seriously and are actively investigating this report."It has been suggested that the leak could have been down to an attack on the passwords of the individuals affected.FBI spokeswoman Laura Eimiller said it was " aware of the allegations concerning computer intrusions and the unlawful release of material involving high profile individuals, and is addressing the matter", adding that it would be inappropriate to make further comment at this time.A spokeswoman for Hunger Games star Jennifer, who is one of the biggest celebs to be caught up in the scandal, said the actress had asked US authorities to prosecute whoever is posting the photos.Even worse than seeing women's privacy violated on social media is reading the accompanying comments that show such a lack of empathy.— Emma Watson (@EmWatson) September 1, 2014Liz Mahoney described the publication of the images as "a flagrant violation of privacy".Other stars said to have been affected by the nude picture leak include Avril Lavigne, Cat Deeley and Rihanna, with actress Mary Elizabeth Winstead, whose movies include A Good Day To Die Hard, already acknowledging pictures in which she is featured are genuine.She wrote online: "To those of you looking at photos I took with my husband years ago in the privacy of our home, hope you feel great about yourselves."However, representatives for the former Coronation Street star Michelle Keegan, who was reportedly on a list of stars whose pictures had been obtained, say she does not appear to have affected.A spokeswoman for the actress said: "There's no evidence that her phone or computer has been hacked, and nothing has appeared online to suggest otherwise either."The "don't take naked pics if you don't want them online" argument is the "she was wearing a short skirt" of the web. Ugh.— Lena Dunham (@lenadunham) September 1, 2014"The end of the fun, Apple has just patched," read an update on the post.According to the post, the script uses the top 500 most common passwords approved by Apple in order to try and gain access to user accounts. If successful, it would give the hacker full access to the iCloud account, and therefore photos.Owen Williams from technology site The Next Web, who discovered the bug, said: "The Python script found on GitHub appears to have allowed a malicious user to repeatedly guess passwords on Apple's 'Find my iPhone' service without alerting the user or locking out the attacker."Given enough patience and the apparent hole being open long enough, the attacker could use password dictionaries to guess common passwords rapidly."Many users use simple passwords that are the same across services so it's entirely possible to guess passwords using a tool like this."If the attacker was successful and gets a match by guessing passwords against Find my iPhone, they would be able to, in theory, use this to log into iCloud and sync the iCloud Photo Stream with another Mac or iPhone in a few minutes, again, without the attacked user's knowledge."We can't be sure that this is related to the leaked photos, but the timing suggests a possible correlation."Experts have pointed to the weakness of many internet users' passwords, and basic security knowledge as being the cause for the widespread leak.