Malicious Web sites can use the flaw to spoof content from a trusted Web site.
Internet security research group Secunia issued a warning Wednesday about a security vulnerability it says it has discovered within Microsoft's Internet Explorer Web browser. The flaw, which Secunia has ranked as "moderately critical," is found within Internet Explorer versions 5.01, 5.5, and 6, Secunia says in an advisory.
Internet Explorer doesn't block malicious Web sites from inserting "arbitrary content" in an arbitrary frame in a browser window, the Danish security firm says. Secunia says the malicious content will appear as if it originated from a trusted site, which is an attack commonly known as spoofing.
Secunia says it has verified the flaw in "a fully patched Internet Explorer 6 running on Microsoft Windows XP" and that other versions of Internet Explorer could also be affected by this vulnerability.
Secunia's only advice is that Internet Explorer users not visit untrusted Web sites or select a different browser.
Microsoft was not immediately available for comment.
5 Top Federal Initiatives For 2015As InformationWeek Government readers were busy firming up their fiscal year 2015 budgets, we asked them to rate more than 30 IT initiatives in terms of importance and current leadership focus. No surprise, among more than 30 options, security is No. 1. After that, things get less predictable.
Top IT Trends to Watch in Financial ServicesIT pros at banks, investment houses, insurance companies, and other financial services organizations are focused on a range of issues, from peer-to-peer lending to cybersecurity to performance, agility, and compliance. It all matters.
Join us for a roundup of the top stories on InformationWeek.com for the week of September 18, 2016. We'll be talking with the InformationWeek.com editors and correspondents who brought you the top stories of the week to get the "story behind the story."