CVE-2025-8033

MEDIUM EPSS 27.0%
Published Jul 22, 202511mo ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
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Published Jul 22, 2025 11mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
27.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 7

VendorProductVersionRange
mozillafirefox* <115.26.0
mozillafirefox* <141.0
mozillafirefox*≥128.0  –  <128.13.0
mozillafirefox*≥140.0  –  <140.1.0
mozillathunderbird* <128.13.0
mozillathunderbird* <141.0
mozillathunderbird*≥140.0  –  <140.1.0

References 9

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1973990
    Permissions Required
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/07/msg00016.html
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-56/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-57/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-58/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-59/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-61/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-62/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-63/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.