CVE-2017-5386

moderate-risk
Published 2018-06-11

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.

Do I need to act?

~
1.2% 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
7
CVSS 7.3/10 High
NETWORK / LOW complexity

Affected Products (19)

Affected Vendors

Debian Redhat Mozilla

References (16)

Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0190.html
Third Party Advisory http://www.securityfocus.com/bid/95769
Third Party Advisory http://www.securitytracker.com/id/1037693
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1319070
Third Party Advisory https://security.gentoo.org/glsa/201702-22
Third Party Advisory https://www.debian.org/security/2017/dsa-3771
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-01/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-02/
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0190.html
Third Party Advisory http://www.securityfocus.com/bid/95769
Third Party Advisory http://www.securitytracker.com/id/1037693
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1319070
Third Party Advisory https://security.gentoo.org/glsa/201702-22
Third Party Advisory https://www.debian.org/security/2017/dsa-3771
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-01/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-02/
49
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 4/34 · Minimal
Exposure 19/34 · Moderate