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CVE-2025-1942

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Date: March 4, 2025

When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string This vulnerability affects Firefox < 136 and Thunderbird < 136.

Severity Score

Related Resources (5)

https://www.mozilla.org/security/advisories/mfsa2025-14/
https://bugzilla.mozilla.org/show_bug.cgi?id=1947139
https://www.mozilla.org/security/advisories/mfsa2025-17/
https://nvd.nist.gov/vuln/detail/CVE-2025-1942
https://www.mend.io/vulnerability-database/CVE-2025-1942

Severity Score

Weakness Type (CWE)

Use of Uninitialized Resource

CWE-908

Top Fix

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Upgrade to version mozjs_sys - no_fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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