JavaScript Engine Vulnerability in Firefox and Thunderbird
CVE-2025-8033

Currently unrated

Key Information:

Vendor

Mozilla

Vendor
CVE Published:
22 July 2025

What is CVE-2025-8033?

This vulnerability occurs in the JavaScript engine, where closed generators are improperly handled, allowing them to be resumed unintentionally. This leads to potential null pointer dereference scenarios, which could allow an attacker to exploit this condition and affect the stability and security of the affected products. Users of Firefox and Thunderbird are advised to update to the latest versions to mitigate this risk.

Affected Version(s)

Firefox < 141

Firefox ESR < 115.26

Firefox ESR < 128.13

References

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Shaheen Fazim
.
CVE-2025-8033 : JavaScript Engine Vulnerability in Firefox and Thunderbird