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Vulnerability details: VCID-3faq-rsnj-tuam
Vulnerability ID VCID-3faq-rsnj-tuam
Aliases CVE-2022-40958
Summary By injecting a cookie with certain special characters, an attacker on a shared subdomain which is not a secure context could set and thus overwrite cookies from a secure context, leading to session fixation and other attacks.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-784 Reliance on Cookies without Validation and Integrity Checking in a Security Decision
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-40958.json
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2022-40958
cvssv3.1 6.5 https://bugzilla.mozilla.org/show_bug.cgi?id=1779993
ssvc Track https://bugzilla.mozilla.org/show_bug.cgi?id=1779993
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2022-40958
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-40
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-41
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-42
cvssv3.1 6.5 https://www.mozilla.org/security/advisories/mfsa2022-40/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-40/
cvssv3.1 6.5 https://www.mozilla.org/security/advisories/mfsa2022-41/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-41/
cvssv3.1 6.5 https://www.mozilla.org/security/advisories/mfsa2022-42/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-42/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-40958.json
https://api.first.org/data/v1/epss?cve=CVE-2022-40958
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-3266
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40956
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40957
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40958
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40959
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40960
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40962
2128794 https://bugzilla.redhat.com/show_bug.cgi?id=2128794
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-2022-40958 https://nvd.nist.gov/vuln/detail/CVE-2022-40958
mfsa2022-40 https://www.mozilla.org/en-US/security/advisories/mfsa2022-40
mfsa2022-40 https://www.mozilla.org/security/advisories/mfsa2022-40/
mfsa2022-41 https://www.mozilla.org/en-US/security/advisories/mfsa2022-41
mfsa2022-41 https://www.mozilla.org/security/advisories/mfsa2022-41/
mfsa2022-42 https://www.mozilla.org/en-US/security/advisories/mfsa2022-42
mfsa2022-42 https://www.mozilla.org/security/advisories/mfsa2022-42/
RHSA-2022:6700 https://access.redhat.com/errata/RHSA-2022:6700
RHSA-2022:6701 https://access.redhat.com/errata/RHSA-2022:6701
RHSA-2022:6702 https://access.redhat.com/errata/RHSA-2022:6702
RHSA-2022:6703 https://access.redhat.com/errata/RHSA-2022:6703
RHSA-2022:6707 https://access.redhat.com/errata/RHSA-2022:6707
RHSA-2022:6708 https://access.redhat.com/errata/RHSA-2022:6708
RHSA-2022:6710 https://access.redhat.com/errata/RHSA-2022:6710
RHSA-2022:6711 https://access.redhat.com/errata/RHSA-2022:6711
RHSA-2022:6713 https://access.redhat.com/errata/RHSA-2022:6713
RHSA-2022:6715 https://access.redhat.com/errata/RHSA-2022:6715
RHSA-2022:6716 https://access.redhat.com/errata/RHSA-2022:6716
RHSA-2022:6717 https://access.redhat.com/errata/RHSA-2022:6717
show_bug.cgi?id=1779993 https://bugzilla.mozilla.org/show_bug.cgi?id=1779993
USN-5649-1 https://usn.ubuntu.com/5649-1/
USN-5724-1 https://usn.ubuntu.com/5724-1/
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-2022-40958.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:N/I:H/A:N Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1779993
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:N/T:P/P:M/B:A/M:M/D:T/2025-04-15T14:54:50Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1779993
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-2022-40958
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:N/I:H/A:N Found at https://www.mozilla.org/security/advisories/mfsa2022-40/
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:N/T:P/P:M/B:A/M:M/D:T/2025-04-15T14:54:50Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-40/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Found at https://www.mozilla.org/security/advisories/mfsa2022-41/
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:N/T:P/P:M/B:A/M:M/D:T/2025-04-15T14:54:50Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-41/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Found at https://www.mozilla.org/security/advisories/mfsa2022-42/
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:N/T:P/P:M/B:A/M:M/D:T/2025-04-15T14:54:50Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-42/
Exploit Prediction Scoring System (EPSS)
Percentile 0.4681
EPSS Score 0.00237
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:10:04.070772+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2022/mfsa2022-41.yml 37.0.0