Is CVE-2021-45086 in the CISA KEV catalog?

No. CVE-2021-45086 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-45086?

CVE-2021-45086 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2021-45086?

CVE-2021-45086 has an EPSS score of 1.29% (67th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-45086?

Upgrade epiphany-browser on debian 11 to 3.38.2-1+deb11u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-45086

MEDIUM

6.1

CVSS v3

NVD

Description

XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 because a server's suggested_filename is used as the pdf_name value in PDF.js.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

epiphany-browserDebian

Fixed in:3.38.2-1+deb11u1CVE-2021-45086

Fixed in:41.2-1CVE-2021-45086

epiphany-browserUbuntu

Fixed in:3.36.4-0ubuntu2USN-5561-1

Fixed in:42.1-1ubuntu1USN-5561-1

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 InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Intelligence

1.29%probability of exploitation in 30 days

67thpercentile

Moderate risk: more likely to be exploited than 67% of all known CVEs.

References

Patch1

gitlab.gnome.org

Exploit1

gitlab.gnome.org

Third-Party Advisory1

debian.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.