CVE-2025-8033

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

22/07/2025

Last modified:

13/04/2026

Description

The JavaScript engine did not handle closed generators correctly and it was possible to resume them leading to a nullptr deref. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x

6.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:mozilla:firefox:::::esr:::*		115.26.0 (excluding)
cpe:2.3:a:mozilla:firefox:::::-:::*		141.0 (excluding)
cpe:2.3:a:mozilla:firefox:::::esr:::*	128.0 (including)	128.13.0 (excluding)
cpe:2.3:a:mozilla:firefox:::::esr:::*	140.0 (including)	140.1.0 (excluding)
cpe:2.3:a:mozilla:thunderbird:::::esr:::*		128.13.0 (excluding)
cpe:2.3:a:mozilla:thunderbird:::::-:::*		141.0 (excluding)
cpe:2.3:a:mozilla:thunderbird:::::esr:::*	140.0 (including)	140.1.0 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-8033

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools