Is CVE-2018-18495 in the CISA KEV catalog?

No. CVE-2018-18495 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-18495?

CVE-2018-18495 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2018-18495?

CVE-2018-18495 has an EPSS score of 1.67% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-18495?

Upgrade firefox on debian unstable to 64.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2018-18495

MEDIUMEPSS 74th pctl

6.5

CVSS v3

NVD

Description

WebExtension content scripts can be loaded into about: pages in some circumstances, in violation of the permissions granted to extensions. This could allow an extension to interfere with the loading and usage of these pages and use capabilities that were intended to be restricted from extensions. This vulnerability affects Firefox < 64.

CWE-732Incorrect Permission Assignment for Critical Resource

How to fix

Remediation Available

firefoxDebian

Fixed in:64.0-1CVE-2018-18495

firefoxUbuntu

Fixed in:64.0+build3-0ubuntu0.14.04.1USN-3844-1

Fixed in:64.0+build3-0ubuntu0.16.04.1USN-3844-1

Fixed in:64.0+build3-0ubuntu0.18.04.1USN-3844-1

DeveloperEditionWindows application

Affected:64.0Fixed in:64.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:64.0Fixed in:64.0Mozilla

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

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.67%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory2

Related Vulnerabilities

Other CWE-732 (Incorrect Permission Assignment for Critical Resource) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2011-3923	Critical	9.8	89%	-	Fix
CVE-2018-15379	Critical	9.8	86%	-	-
CVE-2018-1000207	High	7.2	64%	-	-
CVE-2023-32986	High	8.8	63%	-	-
CVE-2021-44521	Critical	9.1	55%	-	Fix
CVE-2018-13374	Medium	4.3	38%	KEV + Ransom	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.