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Vulnerability details: VCID-n6v5-na4s-j7ed
Vulnerability ID VCID-n6v5-na4s-j7ed
Aliases CVE-2020-6825
Summary Mozilla developers and community members Tyson Smith and Christian Holler reported memory safety bugs present in Firefox 74 and Firefox ESR 68.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787 Out-of-bounds Write
System Score Found at
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6825.json
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
epss 0.00701 https://api.first.org/data/v1/epss?cve=CVE-2020-6825
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2020-6825
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2020-6825
archlinux Critical https://security.archlinux.org/AVG-1127
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-12
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-13
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2020-14
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6825.json
https://api.first.org/data/v1/epss?cve=CVE-2020-6825
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1572541%2C1620193%2C1620203
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6819
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6820
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6821
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6822
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6825
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2020-12/
https://www.mozilla.org/security/advisories/mfsa2020-13/
1821682 https://bugzilla.redhat.com/show_bug.cgi?id=1821682
ASA-202004-8 https://security.archlinux.org/ASA-202004-8
AVG-1127 https://security.archlinux.org/AVG-1127
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-2020-6825 https://nvd.nist.gov/vuln/detail/CVE-2020-6825
mfsa2020-12 https://www.mozilla.org/en-US/security/advisories/mfsa2020-12
mfsa2020-13 https://www.mozilla.org/en-US/security/advisories/mfsa2020-13
mfsa2020-14 https://www.mozilla.org/en-US/security/advisories/mfsa2020-14
RHSA-2020:1404 https://access.redhat.com/errata/RHSA-2020:1404
RHSA-2020:1406 https://access.redhat.com/errata/RHSA-2020:1406
RHSA-2020:1420 https://access.redhat.com/errata/RHSA-2020:1420
RHSA-2020:1429 https://access.redhat.com/errata/RHSA-2020:1429
RHSA-2020:1488 https://access.redhat.com/errata/RHSA-2020:1488
RHSA-2020:1489 https://access.redhat.com/errata/RHSA-2020:1489
RHSA-2020:1495 https://access.redhat.com/errata/RHSA-2020:1495
RHSA-2020:1496 https://access.redhat.com/errata/RHSA-2020:1496
USN-4323-1 https://usn.ubuntu.com/4323-1/
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:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-6825.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:H/PR:N/UI:R/S:U/C:H/I:H/A:H 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:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2020-6825
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:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-6825
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 0.71087
EPSS Score 0.00701
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:39.768356+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2020/mfsa2020-12.yml 37.0.0