CVE-2017-5421

Public Exploit

Description

A malicious site could spoof the contents of the print preview window if popup windows are enabled, resulting in user confusion of what site is currently loaded. This vulnerability affects Firefox < 52 and Thunderbird < 52.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.05% Top 25%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Affected: Mozilla Thunderbird
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1301876 issue tracking patch vendor advisory exploit
https://www.mozilla.org/security/advisories/mfsa2017-09/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2017-05/ vendor advisory
http://www.securitytracker.com/id/1037966 vdb entry third party advisory
http://www.securityfocus.com/bid/96692 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-5421?
CVE-2017-5421 has been scored as a high severity vulnerability.
How to fix CVE-2017-5421?
To fix CVE-2017-5421, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-5421 being actively exploited in the wild?
It is possible that CVE-2017-5421 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-5421?
CVE-2017-5421 affects Mozilla Firefox, Mozilla Thunderbird.
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