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Vulnerability details: VCID-h2a7-nqm5-4ua1
Vulnerability ID VCID-h2a7-nqm5-4ua1
Aliases CVE-2021-23982
Summary Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network's hosts as well as services running on the user's local machine utilizing WebRTC connections.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-326 Inadequate Encryption Strength
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23982.json
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
epss 0.00196 https://api.first.org/data/v1/epss?cve=CVE-2021-23982
cvssv3.1 6.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-23982
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-23982
archlinux High https://security.archlinux.org/AVG-1728
archlinux High https://security.archlinux.org/AVG-1729
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-10
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-11
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-12
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23982.json
https://api.first.org/data/v1/epss?cve=CVE-2021-23982
https://bugzilla.mozilla.org/show_bug.cgi?id=1677046
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23981
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23982
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23984
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23987
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29950
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29955
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4127
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2021-10/
1942785 https://bugzilla.redhat.com/show_bug.cgi?id=1942785
AVG-1728 https://security.archlinux.org/AVG-1728
AVG-1729 https://security.archlinux.org/AVG-1729
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-2021-23982 https://nvd.nist.gov/vuln/detail/CVE-2021-23982
mfsa2021-10 https://www.mozilla.org/en-US/security/advisories/mfsa2021-10
mfsa2021-11 https://www.mozilla.org/en-US/security/advisories/mfsa2021-11
mfsa2021-12 https://www.mozilla.org/en-US/security/advisories/mfsa2021-12
RHSA-2021:0989 https://access.redhat.com/errata/RHSA-2021:0989
RHSA-2021:0990 https://access.redhat.com/errata/RHSA-2021:0990
RHSA-2021:0991 https://access.redhat.com/errata/RHSA-2021:0991
RHSA-2021:0992 https://access.redhat.com/errata/RHSA-2021:0992
RHSA-2021:0993 https://access.redhat.com/errata/RHSA-2021:0993
RHSA-2021:0994 https://access.redhat.com/errata/RHSA-2021:0994
RHSA-2021:0995 https://access.redhat.com/errata/RHSA-2021:0995
RHSA-2021:0996 https://access.redhat.com/errata/RHSA-2021:0996
USN-4893-1 https://usn.ubuntu.com/4893-1/
USN-4995-1 https://usn.ubuntu.com/4995-1/
USN-4995-2 https://usn.ubuntu.com/4995-2/
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-2021-23982.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:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23982
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:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23982
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 0.41959
EPSS Score 0.00196
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:47.890691+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2021/mfsa2021-10.yml 37.0.0