CVE-2018-12398

Description

By using the reflected URL in some special resource URIs, such as chrome:, it is possible to inject stylesheets and bypass Content Security Policy (CSP). This vulnerability affects Firefox < 63.

6.5

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.43%

Vendor Advisory ubuntu.com Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Firefox

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2018-26/	vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1460538	vendor advisory issue tracking permissions required
http://www.securityfocus.com/bid/105721	third party advisory vdb entry
https://usn.ubuntu.com/3801-1/	third party advisory vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1488061	vendor advisory issue tracking permissions required
http://www.securitytracker.com/id/1041944	third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2018-12398?: CVE-2018-12398 has been scored as a medium severity vulnerability.
How to fix CVE-2018-12398?: To fix CVE-2018-12398, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-12398 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2018-12398 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-12398?: CVE-2018-12398 affects Mozilla Firefox.

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