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Vulnerability details: VCID-4g4j-e7x5-zfhs
Vulnerability ID VCID-4g4j-e7x5-zfhs
Aliases CVE-2025-6430
Summary When a file download is specified via the Content-Disposition header, that directive would be ignored if the file was included via a <embed> or <object> tag, potentially making a website vulnerable to a cross-site scripting attack.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-6430.json
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-6430
cvssv3.1 6.1 https://bugzilla.mozilla.org/show_bug.cgi?id=1971140
ssvc Track https://bugzilla.mozilla.org/show_bug.cgi?id=1971140
cvssv3.1 6.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-51
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-53
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-54
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-55
cvssv3.1 6.1 https://www.mozilla.org/security/advisories/mfsa2025-51/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-51/
cvssv3.1 6.1 https://www.mozilla.org/security/advisories/mfsa2025-53/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-53/
cvssv3.1 6.1 https://www.mozilla.org/security/advisories/mfsa2025-54/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-54/
cvssv3.1 6.1 https://www.mozilla.org/security/advisories/mfsa2025-55/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-55/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-6430.json
https://api.first.org/data/v1/epss?cve=CVE-2025-6430
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-6430
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2374555 https://bugzilla.redhat.com/show_bug.cgi?id=2374555
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-2025-6430 https://nvd.nist.gov/vuln/detail/CVE-2025-6430
mfsa2025-51 https://www.mozilla.org/en-US/security/advisories/mfsa2025-51
mfsa2025-51 https://www.mozilla.org/security/advisories/mfsa2025-51/
mfsa2025-53 https://www.mozilla.org/en-US/security/advisories/mfsa2025-53
mfsa2025-53 https://www.mozilla.org/security/advisories/mfsa2025-53/
mfsa2025-54 https://www.mozilla.org/en-US/security/advisories/mfsa2025-54
mfsa2025-54 https://www.mozilla.org/security/advisories/mfsa2025-54/
mfsa2025-55 https://www.mozilla.org/en-US/security/advisories/mfsa2025-55
mfsa2025-55 https://www.mozilla.org/security/advisories/mfsa2025-55/
RHSA-2025:10072 https://access.redhat.com/errata/RHSA-2025:10072
RHSA-2025:10073 https://access.redhat.com/errata/RHSA-2025:10073
RHSA-2025:10074 https://access.redhat.com/errata/RHSA-2025:10074
RHSA-2025:10159 https://access.redhat.com/errata/RHSA-2025:10159
RHSA-2025:10160 https://access.redhat.com/errata/RHSA-2025:10160
RHSA-2025:10161 https://access.redhat.com/errata/RHSA-2025:10161
RHSA-2025:10163 https://access.redhat.com/errata/RHSA-2025:10163
RHSA-2025:10164 https://access.redhat.com/errata/RHSA-2025:10164
RHSA-2025:10165 https://access.redhat.com/errata/RHSA-2025:10165
RHSA-2025:10166 https://access.redhat.com/errata/RHSA-2025:10166
RHSA-2025:10181 https://access.redhat.com/errata/RHSA-2025:10181
RHSA-2025:10182 https://access.redhat.com/errata/RHSA-2025:10182
RHSA-2025:10183 https://access.redhat.com/errata/RHSA-2025:10183
RHSA-2025:10184 https://access.redhat.com/errata/RHSA-2025:10184
RHSA-2025:10185 https://access.redhat.com/errata/RHSA-2025:10185
RHSA-2025:10186 https://access.redhat.com/errata/RHSA-2025:10186
RHSA-2025:10187 https://access.redhat.com/errata/RHSA-2025:10187
RHSA-2025:10188 https://access.redhat.com/errata/RHSA-2025:10188
RHSA-2025:10195 https://access.redhat.com/errata/RHSA-2025:10195
RHSA-2025:10196 https://access.redhat.com/errata/RHSA-2025:10196
RHSA-2025:10246 https://access.redhat.com/errata/RHSA-2025:10246
show_bug.cgi?id=1971140 https://bugzilla.mozilla.org/show_bug.cgi?id=1971140
USN-7663-1 https://usn.ubuntu.com/7663-1/
No exploits are available.
Vector: CVSS:3.1/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-2025-6430.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://bugzilla.mozilla.org/show_bug.cgi?id=1971140
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/2025-06-25T14:21:08Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1971140
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L 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:R/S:C/C:L/I:L/A:N Found at https://www.mozilla.org/security/advisories/mfsa2025-51/
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/2025-06-25T14:21:08Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-51/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.mozilla.org/security/advisories/mfsa2025-53/
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/2025-06-25T14:21:08Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-53/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.mozilla.org/security/advisories/mfsa2025-54/
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/2025-06-25T14:21:08Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-54/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.mozilla.org/security/advisories/mfsa2025-55/
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/2025-06-25T14:21:08Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-55/
Exploit Prediction Scoring System (EPSS)
Percentile 0.21864
EPSS Score 0.0007
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:23.019776+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2025/mfsa2025-55.yml 37.0.0