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CVE

CVE-2025-1933

On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can poten

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. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

HIGH · CVSS 7.6 EPSS 0.00487
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
▤

Affected Products & Versions

5
mozilla firefox< 115.21.0
mozilla firefox< 136.0
mozilla firefox>= 116.0 and < 128.8.0
mozilla thunderbird< 128.8
mozilla thunderbird>= 129.0 and < 136.0
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

7.6
HIGH · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Mar 2025 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

19
usnUSN-7663-1
suse-csafSUSE-SU-2025:0849-1
suse-csafopenSUSE-SU-2025:14861-1
usnUSN-7334-1
suse-csafopenSUSE-SU-2025:14853-1
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.mozilla.org/show_bug.cgi?id=1946004Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2025-14/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-15/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-16/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-17/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-18/Vendor Advisory
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