When trying to load a non-video in an audio/video context the exact status code (200, 302, 404, 500, 412, 403, etc.) was disclosed via the MediaError Message. This level of information leakage is inconsistent with the standardized onerror/onsuccess disclosure and can lead to inferring login status to services or device discovery on a local network among other attacks. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

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Advisories
Source ID Title
EUVD EUVD EUVD-2020-7653 When trying to load a non-video in an audio/video context the exact status code (200, 302, 404, 500, 412, 403, etc.) was disclosed via the MediaError Message. This level of information leakage is inconsistent with the standardized onerror/onsuccess disclosure and can lead to inferring login status to services or device discovery on a local network among other attacks. This vulnerability affects Firefox < 80 and Firefox for Android < 80.
Ubuntu USN Ubuntu USN USN-4474-1 Firefox vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 19 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla firefox Mobile
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:* cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:android:*:*
Vendors & Products Mozilla firefox Mobile

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-04T13:22:30.634Z

Reserved: 2020-07-10T00:00:00.000Z

Link: CVE-2020-15666

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-10-01T19:15:13.203

Modified: 2026-08-19T15:29:21.807

Link: CVE-2020-15666

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses