Advertisers and other third parties had the potential to gain unauthorized access to many Facebook user accounts and profile information because of a software flaw, Symantec Corp. said Tuesday night.

Facebook says that it has discovered a security breach affecting nearly 50 million accounts and that it's not yet clear whether any information was accessed or any accounts were otherwise misused. The ...

Report shows the importance of ensuring OAuth implementation is secure to protect against identity theft, financial fraud, and access to personal information ...