CVE-2020-15651: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 0.6% chance of exploitation in the next 30 days.

A unicode RTL order character in the downloaded file name can be used to change the file's name during the download UI flow to change the file extension. This vulnerability affects Firefox for iOS < 28.

Affected products

• Mozilla Firefox: before 28.0 (fixed in 28.0)

Published 2020-08-10. Last modified 2026-06-17.