Vulnerability in Mozilla Firefox

CVE-2020-15655

A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

EPSS: 0.015 (72.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

References

Frequently asked questions

What is CVE-2020-15655?
CVE-2020-15655 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 6.5/10. Published 2020-08-10.
How severe is CVE-2020-15655?
Medium severity. CVSS v3 base score is 6.5 out of 10.