CVE-2020-15665

PoC —

CVSS 3.1

4.3 medium

EPSS

<1%p51

Published

Oct 1, 2020 (Oct 1, 2020)

Modified

Jun 17, 2026

Description

Firefox did not reset the address bar after the beforeunload dialog was shown if the user chose to remain on the page. This could have resulted in an incorrect URL being shown when used in conjunction with other unexpected browser behaviors. This vulnerability affects Firefox < 80.

Vendors: mozilla
Products: firefox
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.7%)

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