Vulnerability in Mozilla Firefox
CVE-2017-7821
A vulnerability where WebExtensions can download and attempt to open a file of some non-executable file types. This can be triggered without specific user interaction for the file download and open actions. This could be used to trigger known vulnerabilities in the programs that handle those document types. This vulnerability affects Firefox < 56.
EPSS: 0.020 (78.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Mozilla Firefox — versions unspecified
Weakness classification (CWE)
References
- security@mozilla.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
- security@mozilla.org (x_refsource_CONFIRM, Exploit, Issue Tracking)
- security@mozilla.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2017-7821?
- CVE-2017-7821 is a critical-severity vulnerability in Mozilla Firefox, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 9.8/10. Published 2018-06-11.
- How severe is CVE-2017-7821?
- Critical severity. CVSS v3 base score is 9.8 out of 10.