CVE-2016-5251
Mozilla: Location bar spoofing via data URLs with malformed/invalid mediatypes (MFSA 2016-66)
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · August 2, 2016
Updated · November 21, 2025
Description
Mozilla Firefox before 48.0 allows remote attackers to spoof the location bar via crafted characters in the media type of a data: URL.
Statement
This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 4.3CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS 2.0 · 4.3AV:N/AC:M/Au:N/C:N/I:P/A:N
CWE not specified