Description

When importing resources using Web Workers, error messages would distinguish the difference between `application/javascript` responses and non-script responses. This could have been abused to learn information cross-origin. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.

Classification

CVE ID: CVE-2024-4769

Affected Products

Vendor: Mozilla

Product: Firefox

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 12.91% (scored less or equal to compared to others)

EPSS Date: 2025-03-14 (when was this score calculated)

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1886108
https://www.mozilla.org/security/advisories/mfsa2024-21/
https://www.mozilla.org/security/advisories/mfsa2024-22/
https://www.mozilla.org/security/advisories/mfsa2024-23/
https://lists.debian.org/debian-lts-announce/2024/05/msg00010.html
https://lists.debian.org/debian-lts-announce/2024/05/msg00012.html

Timeline