CVE-2017-7821

moderate-risk
Published 2018-06-11

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.

Do I need to act?

~
2.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Mozilla

References (8)

Third Party Advisory http://www.securityfocus.com/bid/101057
Third Party Advisory http://www.securitytracker.com/id/1039465
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1346515
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-21/
Third Party Advisory http://www.securityfocus.com/bid/101057
Third Party Advisory http://www.securitytracker.com/id/1039465
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1346515
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-21/
43
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 6/34 · Minimal
Exposure 5/34 · Minimal