CVE-2018-12368

Name: CVE-2018-12368
Creator: NVD / NIST
Published: 2018-10-18T13:29:03.307+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.83%

Last modified Jun 17, 2026

CVE-2018-12368 is a vulnerability of currently unknown severity. Windows 10 does not warn users before opening executable files with the SettingContent-ms extension even when they have been downloaded from the internet and have the "Mark of the Web." Without the warning, unsuspecting users unfamiliar with this new file type might run an unwanted executable. This also allows a WebExtension with the limited downloads.open permission to execute arbitrary code without user interaction on Windows 10 systems. EPSS estimates a 4.83% chance of exploitation in the next 30 days.

Description

Windows 10 does not warn users before opening executable files with the SettingContent-ms extension even when they have been downloaded from the internet and have the "Mark of the Web." Without the warning, unsuspecting users unfamiliar with this new file type might run an unwanted executable. This also allows a WebExtension with the limited downloads.open permission to execute arbitrary code without user interaction on Windows 10 systems. *Note: this issue only affects Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.

Metrics

EPSS Probability

4.83%

90.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 61.0
Mozilla	Firefox	>= 53.0, < 60.1.0
Mozilla	Firefox Esr	< 52.9
Mozilla	Thunderbird	< 52.9

References

http://www.securityfocus.com/bid/104560Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041193Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1468217Issue Tracking, Permissions Required, Vendor Advisory
https://posts.specterops.io/the-tale-of-settingcontent-ms-files-f1ea253e4d39Exploit, Third Party Advisory
https://security.gentoo.org/glsa/201810-01Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-15/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-16/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-17/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-18/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-19/Vendor Advisory
http://www.securityfocus.com/bid/104560Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041193Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1468217Issue Tracking, Permissions Required, Vendor Advisory
https://posts.specterops.io/the-tale-of-settingcontent-ms-files-f1ea253e4d39Exploit, Third Party Advisory
https://security.gentoo.org/glsa/201810-01Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-15/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-16/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-17/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-18/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-19/Vendor Advisory

Timeline

Published: Oct 18, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-12368?

How severe is CVE-2018-12368?

Severity scoring for CVE-2018-12368 is pending analysis. The EPSS model estimates a 4.83% probability of exploitation in the next 30 days.

How do I fix CVE-2018-12368?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-12368?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST