A flaw in a popular older version of an open-source networking library used by a number of iOS apps could create an exploitable vulnerability, particularly for users who do not keep their apps up-to-date. The issue could allow a hacker to bypass HTTPS security and conceivably steal passwords or other personal data. While the library in question was patched to address the problem three weeks ago, apps which include the older library are still vulnerable. According to SourceDNA, at least 1,500 iOS apps are currently exposed.