CVE Database›Document archive›CVE-2017-7814

CVE-2017-7814

Mozilla: Blob and data URLs bypass phishing and malware protection warnings (MFSA 2017-22)

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Severity

Moderate

Red Hat Product Security

7.8

CVSS 3.0

Review impact separately from score.

Published · September 28, 2017

Updated · November 26, 2025

Description

File downloads encoded with "blob:" and "data:" URL elements bypassed normal file download checks though the Phishing and Malware Protection feature and its block lists of suspicious sites and files. This would allow malicious sites to lure users into downloading executables that would otherwise be detected as suspicious. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 7.8
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-494 · Download of Code Without Integrity Check