What’s Vulnerable › Vulnerabilities

CVE-2020-15651

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-08-10 · updated 2026-06-17

Description

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

How to fix

Upgrade to a fixed version: Mozilla Firefox 28.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1649160
• https://www.mozilla.org/security/advisories/mfsa2020-34/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1649160
• https://www.mozilla.org/security/advisories/mfsa2020-34/

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