Is CVE-2018-5116 in the CISA KEV catalog?

No. CVE-2018-5116 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-5116?

CVE-2018-5116 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2018-5116?

CVE-2018-5116 has an EPSS score of 1.13% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-5116?

Upgrade firefox on debian unstable to 58.0-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-5116

CRITICAL

9.8

CVSS v3

NVD

Description

WebExtensions with the "ActiveTab" permission are able to access frames hosted within the active tab even if the frames are cross-origin. Malicious extensions can inject frames from arbitrary origins into the loaded page and then interact with them, bypassing same-origin user expectations with this permission. This vulnerability affects Firefox < 58.

CWE-346

How to fix

Remediation Available

firefoxDebian

Fixed in:58.0-1CVE-2018-5116

firefoxUbuntu

Fixed in:58.0+build6-0ubuntu0.14.04.1USN-3544-1

Fixed in:58.0+build6-0ubuntu0.16.04.1USN-3544-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.13%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Third-Party Advisory3

Issue Tracking1

bugzilla.mozilla.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.