Is CVE-2018-5124 in the CISA KEV catalog?

No. CVE-2018-5124 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-5124?

CVE-2018-5124 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2018-5124?

CVE-2018-5124 has an EPSS score of 1.01% (59th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-5124?

Upgrade firefox on debian unstable to 58.0.1-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2018-5124

MEDIUM

6.1

CVSS v3

NVD

Description

Unsanitized output in the browser UI leaves HTML tags in place and can result in arbitrary code execution in Firefox before version 58.0.1.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

firefoxDebian

Fixed in:58.0.1-1CVE-2018-5124

firefoxUbuntu

Fixed in:58.0.1+build1-0ubuntu0.14.04.1USN-3552-1

Fixed in:58.0.1+build1-0ubuntu0.16.04.1USN-3552-1

DeveloperEditionWindows application

Affected:58.0.1Fixed in:58.0.1Mozilla

Mozilla Firefox (en-US)Windows application

Affected:58.0.1Fixed in:58.0.1Mozilla

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 InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

1.01%probability of exploitation in 30 days

59thpercentile

Moderate risk: more likely to be exploited than 59% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	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.