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Vulnerability details: VCID-16e7-bj17-c7dg
Vulnerability ID VCID-16e7-bj17-c7dg
Aliases CVE-2024-8383
Summary Firefox normally asks for confirmation before asking the operating system to find an application to handle a scheme that the browser does not support. It did not ask before doing so for the Usenet-related schemes news: and snews:. Since most operating systems don't have a trusted newsreader installed by default, an unscrupulous program that the user downloaded could register itself as a handler. The website that served the application download could then launch that application at will.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-862 Missing Authorization
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-8383.json
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
epss 0.00233 https://api.first.org/data/v1/epss?cve=CVE-2024-8383
cvssv3.1 7.5 https://bugzilla.mozilla.org/show_bug.cgi?id=1908496
ssvc Track https://bugzilla.mozilla.org/show_bug.cgi?id=1908496
cvssv3.1 4.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2024-8383
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2024-39
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2024-40
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2024-41
cvssv3.1 7.5 https://www.mozilla.org/security/advisories/mfsa2024-39/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2024-39/
cvssv3.1 7.5 https://www.mozilla.org/security/advisories/mfsa2024-40/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2024-40/
cvssv3.1 7.5 https://www.mozilla.org/security/advisories/mfsa2024-41/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2024-41/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-8383.json
https://api.first.org/data/v1/epss?cve=CVE-2024-8383
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-8383
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2309429 https://bugzilla.redhat.com/show_bug.cgi?id=2309429
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:*:*:*:*:*:*:*:*
CVE-2024-8383 https://nvd.nist.gov/vuln/detail/CVE-2024-8383
mfsa2024-39 https://www.mozilla.org/en-US/security/advisories/mfsa2024-39
mfsa2024-39 https://www.mozilla.org/security/advisories/mfsa2024-39/
mfsa2024-40 https://www.mozilla.org/en-US/security/advisories/mfsa2024-40
mfsa2024-40 https://www.mozilla.org/security/advisories/mfsa2024-40/
mfsa2024-41 https://www.mozilla.org/en-US/security/advisories/mfsa2024-41
mfsa2024-41 https://www.mozilla.org/security/advisories/mfsa2024-41/
RHSA-2024:6681 https://access.redhat.com/errata/RHSA-2024:6681
RHSA-2024:6682 https://access.redhat.com/errata/RHSA-2024:6682
RHSA-2024:6782 https://access.redhat.com/errata/RHSA-2024:6782
RHSA-2024:6786 https://access.redhat.com/errata/RHSA-2024:6786
RHSA-2024:6838 https://access.redhat.com/errata/RHSA-2024:6838
RHSA-2024:6839 https://access.redhat.com/errata/RHSA-2024:6839
RHSA-2024:6850 https://access.redhat.com/errata/RHSA-2024:6850
RHSA-2024:6891 https://access.redhat.com/errata/RHSA-2024:6891
RHSA-2024:6892 https://access.redhat.com/errata/RHSA-2024:6892
show_bug.cgi?id=1908496 https://bugzilla.mozilla.org/show_bug.cgi?id=1908496
USN-6992-1 https://usn.ubuntu.com/6992-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-8383.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:N/S:U/C:N/I:H/A:N Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1908496
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-30T16:16:58Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1908496
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2024-8383
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:N/S:U/C:N/I:H/A:N Found at https://www.mozilla.org/security/advisories/mfsa2024-39/
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-30T16:16:58Z/ Found at https://www.mozilla.org/security/advisories/mfsa2024-39/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://www.mozilla.org/security/advisories/mfsa2024-40/
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-30T16:16:58Z/ Found at https://www.mozilla.org/security/advisories/mfsa2024-40/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://www.mozilla.org/security/advisories/mfsa2024-41/
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-30T16:16:58Z/ Found at https://www.mozilla.org/security/advisories/mfsa2024-41/
Exploit Prediction Scoring System (EPSS)
Percentile 0.46093
EPSS Score 0.00233
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:06.423317+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2024/mfsa2024-41.yml 37.0.0