Vulnerability in Mozilla Firefox

CVE-2017-5386

WebExtension scripts can use the "data:" protocol to affect pages loaded by other web extensions using this protocol, leading to potential data disclosure or privilege escalation in affected extensions. This vulnerability affects Firefox ESR < 45.7 and Firefox < 51.

EPSS: 0.023 (81.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

References

Frequently asked questions

What is CVE-2017-5386?
CVE-2017-5386 is a high-severity vulnerability in Mozilla Firefox. CVSS score: 7.3/10. Published 2018-06-11.
How severe is CVE-2017-5386?
High severity. CVSS v3 base score is 7.3 out of 10.