Is CVE-2018-5109 in the CISA KEV catalog?

No. CVE-2018-5109 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-5109?

CVE-2018-5109 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2018-5109?

CVE-2018-5109 has an EPSS score of 0.62% (45th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-5109?

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

CVE & CISA-KEV Catalog

CVE-2018-5109

MEDIUM

5.3

CVSS v3

NVD

Description

An audio capture session can started under an incorrect origin from the site making the capture request. Users are still prompted to allow the request but the prompt can display the wrong origin, leading to user confusion about which site is making the request to capture an audio stream. This vulnerability affects Firefox < 58.

CWE-346

How to fix

Remediation Available

firefoxDebian

Fixed in:58.0-1CVE-2018-5109

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

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.62%probability of exploitation in 30 days

45thpercentile

Moderate risk: more likely to be exploited than 45% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Third-Party Advisory3

Issue Tracking1

bugzilla.mozilla.org

Related Vulnerabilities

Other CWE-346 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-1185	High	7.2	82%	-	Fix
CVE-2025-34291	High	8.8	79%	KEV	-
CVE-2020-16952	High	8.6	71%	-	-
CVE-2023-29711	Critical	9.8	70%	-	-
CVE-2015-4495	High	8.8	70%	KEV	Fix
CVE-2024-23898	High	8.8	67%	-	Fix

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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.