Is CVE-2020-6798 in the CISA KEV catalog?

No. CVE-2020-6798 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-6798?

CVE-2020-6798 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2020-6798?

CVE-2020-6798 has an EPSS score of 2.06% (79th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-6798?

Upgrade firefox on debian unstable to 73.0-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2020-6798

MEDIUMEPSS 79th pctl

6.1

CVSS v3

NVD

Description

If a template tag was used in a select tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result. In general, this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but is potentially a risk in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

firefoxDebian

Fixed in:73.0-1CVE-2020-6798

firefoxUbuntu

Fixed in:73.0.1+build1-0ubuntu0.16.04.1USN-4278-2

Fixed in:73.0+build3-0ubuntu0.18.04.1USN-4278-1

thunderbirdUbuntu

Fixed in:1:68.7.0+build1-0ubuntu0.16.04.2USN-4335-1

Fixed in:1:68.7.0+build1-0ubuntu0.18.04.1USN-4328-1

DeveloperEditionWindows application

Affected:73.0Fixed in:73.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:73.0Fixed in:73.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:68.5.0Fixed in:68.5.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:68.5.0Fixed in:68.5.0Mozilla

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

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

2.06%probability of exploitation in 30 days

79thpercentile

Elevated risk: more likely to be exploited than 79% of all known CVEs.

References

Vendor Advisory3

Other references6

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

Embed a live status badge for CVE-2020-6798

Markdown

[![CVE-2020-6798](https://tridentstack.com/cve/badge/CVE-2020-6798.svg)](https://tridentstack.com/cve/CVE-2020-6798)

HTML

<a href="https://tridentstack.com/cve/CVE-2020-6798"><img src="https://tridentstack.com/cve/badge/CVE-2020-6798.svg" alt="CVE-2020-6798"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.