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Vulnerability details: VCID-6buv-dv9r-2qau
Vulnerability ID VCID-6buv-dv9r-2qau
Aliases CVE-2020-6811
Summary The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP method of a request, which can be controlled by the website. If a user used the 'Copy as Curl' feature and pasted the command into a terminal, it could have resulted in command injection and arbitrary command execution.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-20 Improper Input Validation
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')
System Score Found at
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6811.json
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01287 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
epss 0.01497 https://api.first.org/data/v1/epss?cve=CVE-2020-6811
cvssv3.1 6.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2020-6811
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2020-6811
archlinux Critical https://security.archlinux.org/AVG-1112
archlinux Critical https://security.archlinux.org/AVG-1115
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-08
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-09
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-10
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6811.json
https://api.first.org/data/v1/epss?cve=CVE-2020-6811
https://bugzilla.mozilla.org/show_bug.cgi?id=1607742
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20503
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6805
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6806
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6807
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6811
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6812
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6814
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2020-08/
https://www.mozilla.org/security/advisories/mfsa2020-09/
https://www.mozilla.org/security/advisories/mfsa2020-10/
1812202 https://bugzilla.redhat.com/show_bug.cgi?id=1812202
ASA-202003-11 https://security.archlinux.org/ASA-202003-11
ASA-202003-8 https://security.archlinux.org/ASA-202003-8
AVG-1112 https://security.archlinux.org/AVG-1112
AVG-1115 https://security.archlinux.org/AVG-1115
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:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
CVE-2020-6811 https://nvd.nist.gov/vuln/detail/CVE-2020-6811
mfsa2020-08 https://www.mozilla.org/en-US/security/advisories/mfsa2020-08
mfsa2020-09 https://www.mozilla.org/en-US/security/advisories/mfsa2020-09
mfsa2020-10 https://www.mozilla.org/en-US/security/advisories/mfsa2020-10
RHSA-2020:0905 https://access.redhat.com/errata/RHSA-2020:0905
RHSA-2020:0914 https://access.redhat.com/errata/RHSA-2020:0914
RHSA-2020:0918 https://access.redhat.com/errata/RHSA-2020:0918
RHSA-2020:0919 https://access.redhat.com/errata/RHSA-2020:0919
USN-4299-1 https://usn.ubuntu.com/4299-1/
USN-4328-1 https://usn.ubuntu.com/4328-1/
USN-4335-1 https://usn.ubuntu.com/4335-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6811.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:C/C:L/I:L/A:N 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:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2020-6811
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:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-6811
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 0.78796
EPSS Score 0.01287
Published At Aug. 5, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:40.483780+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2020/mfsa2020-09.yml 37.0.0