CVE-2020-15665

low-risk

Published 2020-10-01

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.

Do I need to act?

0.19% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 4.3/10 Medium

NETWORK / LOW complexity

Affected Products (1)

Firefox

Affected Vendors

Mozilla

References (4)

Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1651636

Release Notes https://www.mozilla.org/security/advisories/mfsa2020-36/

Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1651636

Release Notes https://www.mozilla.org/security/advisories/mfsa2020-36/

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low-risk

Severity 18/34 · Moderate

Exploitability 1/34 · Minimal

Exposure 5/34 · Minimal