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Vulnerability details: VCID-92ju-8t11-sqf7
Vulnerability ID VCID-92ju-8t11-sqf7
Aliases CVE-2025-4087
Summary A vulnerability was identified in Firefox where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Thunderbird < 138, and Thunderbird ESR < 128.10.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-125 Out-of-bounds Read
System Score Found at
cvssv3 7.6 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-4087.json
epss 0.00031 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00031 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00031 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00031 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00031 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00041 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00041 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00041 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00041 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2025-4087
cvssv3.1 6.5 https://bugzilla.mozilla.org/show_bug.cgi?id=1952465
ssvc Track https://bugzilla.mozilla.org/show_bug.cgi?id=1952465
cvssv3.1 5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-28
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-29
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-31
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-32
cvssv3.1 6.5 https://www.mozilla.org/security/advisories/mfsa2025-28/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-28/
cvssv3.1 6.5 https://www.mozilla.org/security/advisories/mfsa2025-29/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-29/
cvssv3.1 6.5 https://www.mozilla.org/security/advisories/mfsa2025-31/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-31/
cvssv3.1 6.5 https://www.mozilla.org/security/advisories/mfsa2025-32/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-32/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-4087.json
https://api.first.org/data/v1/epss?cve=CVE-2025-4087
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-4087
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2362904 https://bugzilla.redhat.com/show_bug.cgi?id=2362904
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:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
CVE-2025-4087 https://nvd.nist.gov/vuln/detail/CVE-2025-4087
mfsa2025-28 https://www.mozilla.org/en-US/security/advisories/mfsa2025-28
mfsa2025-28 https://www.mozilla.org/security/advisories/mfsa2025-28/
mfsa2025-29 https://www.mozilla.org/en-US/security/advisories/mfsa2025-29
mfsa2025-29 https://www.mozilla.org/security/advisories/mfsa2025-29/
mfsa2025-31 https://www.mozilla.org/en-US/security/advisories/mfsa2025-31
mfsa2025-31 https://www.mozilla.org/security/advisories/mfsa2025-31/
mfsa2025-32 https://www.mozilla.org/en-US/security/advisories/mfsa2025-32
mfsa2025-32 https://www.mozilla.org/security/advisories/mfsa2025-32/
RHSA-2025:4443 https://access.redhat.com/errata/RHSA-2025:4443
RHSA-2025:4458 https://access.redhat.com/errata/RHSA-2025:4458
RHSA-2025:4460 https://access.redhat.com/errata/RHSA-2025:4460
RHSA-2025:4751 https://access.redhat.com/errata/RHSA-2025:4751
RHSA-2025:4752 https://access.redhat.com/errata/RHSA-2025:4752
RHSA-2025:4753 https://access.redhat.com/errata/RHSA-2025:4753
RHSA-2025:4756 https://access.redhat.com/errata/RHSA-2025:4756
RHSA-2025:4797 https://access.redhat.com/errata/RHSA-2025:4797
RHSA-2025:7428 https://access.redhat.com/errata/RHSA-2025:7428
RHSA-2025:7506 https://access.redhat.com/errata/RHSA-2025:7506
RHSA-2025:7507 https://access.redhat.com/errata/RHSA-2025:7507
RHSA-2025:7543 https://access.redhat.com/errata/RHSA-2025:7543
RHSA-2025:7544 https://access.redhat.com/errata/RHSA-2025:7544
RHSA-2025:7545 https://access.redhat.com/errata/RHSA-2025:7545
RHSA-2025:7547 https://access.redhat.com/errata/RHSA-2025:7547
RHSA-2025:7689 https://access.redhat.com/errata/RHSA-2025:7689
RHSA-2025:7690 https://access.redhat.com/errata/RHSA-2025:7690
RHSA-2025:7691 https://access.redhat.com/errata/RHSA-2025:7691
RHSA-2025:7692 https://access.redhat.com/errata/RHSA-2025:7692
RHSA-2025:7693 https://access.redhat.com/errata/RHSA-2025:7693
RHSA-2025:7694 https://access.redhat.com/errata/RHSA-2025:7694
RHSA-2025:7695 https://access.redhat.com/errata/RHSA-2025:7695
show_bug.cgi?id=1952465 https://bugzilla.mozilla.org/show_bug.cgi?id=1952465
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-4087.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:L/I:L/A:N Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1952465
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/2025-04-29T15:51:33Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1952465
Vector: CVSS:3.1/AV:N/AC:H/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:N/S:U/C:L/I:L/A:N Found at https://www.mozilla.org/security/advisories/mfsa2025-28/
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/2025-04-29T15:51:33Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-28/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://www.mozilla.org/security/advisories/mfsa2025-29/
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/2025-04-29T15:51:33Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-29/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://www.mozilla.org/security/advisories/mfsa2025-31/
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/2025-04-29T15:51:33Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-31/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://www.mozilla.org/security/advisories/mfsa2025-32/
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/2025-04-29T15:51:33Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-32/
Exploit Prediction Scoring System (EPSS)
Percentile 0.07228
EPSS Score 0.00031
Published At April 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-04-29T17:00:31.819179+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2025/4xxx/CVE-2025-4087.json 36.0.0