CVE-2018-18497

Description

Limitations on the URIs allowed to WebExtensions by the browser.windows.create API can be bypassed when a pipe in the URL field is used within the extension to load multiple pages as a single argument. This could allow a malicious WebExtension to open privileged about: or file: locations. This vulnerability affects Firefox < 64.

6.5

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.99% Top 25%

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

Affected: Mozilla Firefox

References

Link	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1488180	issue tracking permissions required vendor advisory
https://www.mozilla.org/security/advisories/mfsa2018-29/	vendor advisory
https://usn.ubuntu.com/3844-1/	third party advisory vendor advisory
http://www.securityfocus.com/bid/106167	vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2018-18497?: CVE-2018-18497 has been scored as a medium severity vulnerability.
How to fix CVE-2018-18497?: To fix CVE-2018-18497, 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-2018-18497 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2018-18497 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-18497?: CVE-2018-18497 affects Mozilla Firefox.

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