No bug here, move along
Trawling through Facebook's
documentation, the expert found that a special parameter called "mobile_iframe" opens " the share dialog in an iframe on top of your website" when it is enabled. The feature is available only for mobile.
Facebook replied quickly to the report but did not address the problem because it considers that it isn't a security issue as long as it does not impact an account's integrity (e.g. changing settings), the researcher claims.
Nevertheless, the ability to distribute links on other users' Timeline without authorization is a serious problem and it can also be used to distribute links to malware instead of spam.
"Just imagine how much damage can a link to a malware document or a phishing site cause when shared by a well-known person with thousands of followers," the expert details.