Hackers supporting ISIS have recently been spreading terrorist propaganda on social media by hijacking old, largely abandoned Twitter accounts that were never confirmed via email by their rightful owners, TechCrunch reported on Wednesday.

Generally, the impacted accounts were inactive for long periods of time before they were taken over. Reportedly, many were compromised over the last few days and weeks, while some others have been affected for longer periods of time.

The problem is that some Twitter accounts were created using email addresses that either never truly existed or expired. This allows hackers to commandeer the account by actually creating or recreating the email address that was used to open it in the first place. "This issue has been around for a while but no one really knew and took advantage of it," said hacker, security researcher and ISIS watchdog WauchulaGhost, TechCrunch reported.

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