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Vulnerability details: VCID-z9bt-bsqy-rkc1
Vulnerability ID VCID-z9bt-bsqy-rkc1
Aliases CVE-2025-1933
Summary On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
System Score Found at
cvssv3 7.6 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-1933.json
epss 0.00103 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00115 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00178 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00178 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00178 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00178 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
epss 0.00178 https://api.first.org/data/v1/epss?cve=CVE-2025-1933
cvssv3.1 7.6 https://bugzilla.mozilla.org/show_bug.cgi?id=1946004
ssvc Track https://bugzilla.mozilla.org/show_bug.cgi?id=1946004
cvssv3.1 7.6 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-14
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2025-15
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2025-16
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2025-17
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2025-18
cvssv3.1 7.6 https://www.mozilla.org/security/advisories/mfsa2025-14/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-14/
cvssv3.1 7.6 https://www.mozilla.org/security/advisories/mfsa2025-15/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-15/
cvssv3.1 7.6 https://www.mozilla.org/security/advisories/mfsa2025-16/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-16/
cvssv3.1 7.6 https://www.mozilla.org/security/advisories/mfsa2025-17/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-17/
cvssv3.1 7.6 https://www.mozilla.org/security/advisories/mfsa2025-18/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2025-18/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-1933.json
https://api.first.org/data/v1/epss?cve=CVE-2025-1933
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-1933
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2349794 https://bugzilla.redhat.com/show_bug.cgi?id=2349794
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-2025-1933 https://nvd.nist.gov/vuln/detail/CVE-2025-1933
mfsa2025-14 https://www.mozilla.org/en-US/security/advisories/mfsa2025-14
mfsa2025-14 https://www.mozilla.org/security/advisories/mfsa2025-14/
mfsa2025-15 https://www.mozilla.org/en-US/security/advisories/mfsa2025-15
mfsa2025-15 https://www.mozilla.org/security/advisories/mfsa2025-15/
mfsa2025-16 https://www.mozilla.org/en-US/security/advisories/mfsa2025-16
mfsa2025-16 https://www.mozilla.org/security/advisories/mfsa2025-16/
mfsa2025-17 https://www.mozilla.org/en-US/security/advisories/mfsa2025-17
mfsa2025-17 https://www.mozilla.org/security/advisories/mfsa2025-17/
mfsa2025-18 https://www.mozilla.org/en-US/security/advisories/mfsa2025-18
mfsa2025-18 https://www.mozilla.org/security/advisories/mfsa2025-18/
RHSA-2025:2359 https://access.redhat.com/errata/RHSA-2025:2359
RHSA-2025:2452 https://access.redhat.com/errata/RHSA-2025:2452
RHSA-2025:2479 https://access.redhat.com/errata/RHSA-2025:2479
RHSA-2025:2480 https://access.redhat.com/errata/RHSA-2025:2480
RHSA-2025:2481 https://access.redhat.com/errata/RHSA-2025:2481
RHSA-2025:2484 https://access.redhat.com/errata/RHSA-2025:2484
RHSA-2025:2485 https://access.redhat.com/errata/RHSA-2025:2485
RHSA-2025:2486 https://access.redhat.com/errata/RHSA-2025:2486
RHSA-2025:2699 https://access.redhat.com/errata/RHSA-2025:2699
RHSA-2025:2708 https://access.redhat.com/errata/RHSA-2025:2708
show_bug.cgi?id=1946004 https://bugzilla.mozilla.org/show_bug.cgi?id=1946004
USN-7334-1 https://usn.ubuntu.com/7334-1/
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:U/C:L/I:L/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-1933.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:L/I:L/A:H Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1946004
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/2025-03-04T15:58:36Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1946004
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/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: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H Found at https://www.mozilla.org/security/advisories/mfsa2025-14/
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/2025-03-04T15:58:36Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-14/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H Found at https://www.mozilla.org/security/advisories/mfsa2025-15/
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/2025-03-04T15:58:36Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-15/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H Found at https://www.mozilla.org/security/advisories/mfsa2025-16/
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/2025-03-04T15:58:36Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-16/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H Found at https://www.mozilla.org/security/advisories/mfsa2025-17/
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/2025-03-04T15:58:36Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-17/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H Found at https://www.mozilla.org/security/advisories/mfsa2025-18/
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/2025-03-04T15:58:36Z/ Found at https://www.mozilla.org/security/advisories/mfsa2025-18/
Exploit Prediction Scoring System (EPSS)
Percentile 0.29056
EPSS Score 0.00103
Published At July 31, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:23.736123+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2025/mfsa2025-16.yml 37.0.0