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CVE-2017-5415

MediumPublished

An attack can use a blob URL and script to spoof an arbitrary addressbar URL prefaced by "blob:" as the protocol, leading to user confusion and further...

Published: Jun 11, 2018
Updated: Aug 5, 2024
Assigning CNA: mozilla
Evidence observed: Apr 14, 2017

Primary CVSS

5.3/ 10Medium

nvd · CVSS 3.0

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS probability estimate

12.7%

Moderate · next 30 days

Percentile: 96.1%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

An attack can use a blob URL and script to spoof an arbitrary addressbar URL prefaced by "blob:" as the protocol, leading to user confusion and further spoofing attacks. This vulnerability affects Firefox < 52.

Sources

CVE-2017-5415PoC
Addressbar spoofing through blob URL (Firefox browser). An attack can use a blob URL and script to spoof an arbitrary addressbar URL prefaced by blob: as the protocol, leading to user confusion and further spoofing attacks.
Mozilla Firefox - Address Bar SpoofingExploit
649 · multiple · Apr 14, 2017

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