Cross-site scripting in Mozilla Firefox and Firefox ESR - CVE-2017-5466
Published: April 19, 2017
Vulnerability identifier: #VU6318
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-5466
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
Detailed vulnerability description
The vulnerability allows a remote attacker to perform XSS attacks.
The vulnerability exists due to origin confusion when reloading isolated data:text/html URL. If a page is loaded from an original site through a hyperlink and contains a redirect to a data:text/html URL, triggering a reload will run the reloaded data:text/html page with its origin set incorrectly.
Successful exploitation of this vulnerability may allow an attacker to gain access to potentially sensitive information from another domain.
How to mitigate CVE-2017-5466
Update to Firefox 53 or Firefox ESR 52.1.