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Vulnerability details: VCID-f8cp-8hv4-vkf2
Vulnerability ID VCID-f8cp-8hv4-vkf2
Aliases CVE-2020-6798
Summary If a <template> tag was used in a <select%gt; 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6798.json
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
epss 0.01456 https://api.first.org/data/v1/epss?cve=CVE-2020-6798
cvssv3.1 6.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2020-6798
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2020-6798
archlinux Critical https://security.archlinux.org/AVG-1096
archlinux Critical https://security.archlinux.org/AVG-1099
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-05
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-06
generic_textual none https://www.mozilla.org/en-US/security/advisories/mfsa2020-07
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6798.json
https://api.first.org/data/v1/epss?cve=CVE-2020-6798
https://bugzilla.mozilla.org/show_bug.cgi?id=1602944
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6792
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6793
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6794
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6795
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6796
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6798
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6800
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/202003-10
https://www.mozilla.org/security/advisories/mfsa2020-05/
https://www.mozilla.org/security/advisories/mfsa2020-06/
https://www.mozilla.org/security/advisories/mfsa2020-07/
1801918 https://bugzilla.redhat.com/show_bug.cgi?id=1801918
ASA-202002-5 https://security.archlinux.org/ASA-202002-5
ASA-202002-9 https://security.archlinux.org/ASA-202002-9
AVG-1096 https://security.archlinux.org/AVG-1096
AVG-1099 https://security.archlinux.org/AVG-1099
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
CVE-2020-6798 https://nvd.nist.gov/vuln/detail/CVE-2020-6798
mfsa2020-05 https://www.mozilla.org/en-US/security/advisories/mfsa2020-05
mfsa2020-06 https://www.mozilla.org/en-US/security/advisories/mfsa2020-06
mfsa2020-07 https://www.mozilla.org/en-US/security/advisories/mfsa2020-07
RHSA-2020:0512 https://access.redhat.com/errata/RHSA-2020:0512
RHSA-2020:0519 https://access.redhat.com/errata/RHSA-2020:0519
RHSA-2020:0520 https://access.redhat.com/errata/RHSA-2020:0520
RHSA-2020:0521 https://access.redhat.com/errata/RHSA-2020:0521
RHSA-2020:0565 https://access.redhat.com/errata/RHSA-2020:0565
RHSA-2020:0574 https://access.redhat.com/errata/RHSA-2020:0574
RHSA-2020:0576 https://access.redhat.com/errata/RHSA-2020:0576
RHSA-2020:0577 https://access.redhat.com/errata/RHSA-2020:0577
USN-4278-1 https://usn.ubuntu.com/4278-1/
USN-4278-2 https://usn.ubuntu.com/4278-2/
USN-4328-1 https://usn.ubuntu.com/4328-1/
USN-4335-1 https://usn.ubuntu.com/4335-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6798.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-6798
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-6798
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.78603
EPSS Score 0.01265
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:39.618124+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2020/mfsa2020-06.yml 37.0.0