CVE-2020-15682

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

When a link to an external protocol was clicked, a prompt was presented that allowed the user to choose what application to open it in. An attacker could induce that prompt to be associated with an origin they didn't control, resulting in a spoofing attack. This was fixed by changing external protocol prompts to be tab-modal while also ensuring they could not be incorrectly associated with a different origin. This vulnerability affects Firefox < 82.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-346

Affected software

Vendor	Product	Versions
Mozilla	Firefox	>= unspecified, < 82

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1636654Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-45/Release Notes, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1636654Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-45/Release Notes, Vendor Advisory

Timeline

Published: Oct 22, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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