CVE-2017-5415: Mozilla Firefox vulnerability

CVE-2017-5415: An attack can use a blob URL and script to spoof an arbitrary addressbar URL prefaced by "blob:" as the pro...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 14:55 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2017-5415 let a malicious page make Firefox show a misleading blob-prefixed address, creating user confusion about where they were browsing. The documented impact is spoofing and phishing support, not direct system compromise. Exposure is mainly endpoints where users still run Firefox before version 52. Modern managed environments are unlikely to be exposed if browser patching is enforced. Treat this as a legacy browser hygiene issue. It is not documented as exploited, but outdated browsers increase phishing risk and should be removed from enterprise use. Mitigation focus: Upgrade Firefox to version 52 or later.; Check Mozilla MFSA2017-05 for vendor remediation details.; Remove unsupported legacy Firefox builds from managed endpoints..

Prepared: Jun 7, 2026, 06:44 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 11, 2018, 21:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://www.mozilla.org/security/advisories/mfsa2017-05/CVE reference · x_refsource_CONFIRM
https://bugzilla.mozilla.org/show_bug.cgi?id=1321719CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaFirefoxunspecifiedListed

Weakness

CWE details

No CWE listed

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