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CVE Record

CVE-2017-7834: A "data:" URL loaded in a new tab did not inherit the Content Security Policy (CSP) of the original page, a...

A "data:" URL loaded in a new tab did not inherit the Content Security Policy (CSP) of the original page, allowing for bypasses of the policy including the execution of JavaScript. In prior versions when "data:" documents also inherited the context of the original page this would allow for potential cross-site scripting (XSS) attacks. This vulnerability affects Firefox < 57.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

Firefox versions before 57 could fail to carry a website's Content Security Policy into a newly opened data URL. That could let script run where the site expected CSP to block it, creating potential cross-site scripting risk in affected browsers. Exposure is mainly legacy or unmanaged systems still running Firefox versions older than 57. Organizations using current supported Firefox releases are not indicated as affected by the supplied sources. Treat this as a legacy browser hygiene issue with security impact. It is not supported here as actively exploited, but any Firefox before 57 should be removed from production because CSP bypass can weaken application defenses. Mitigation focus: Upgrade Firefox to version 57 or later, preferably a current supported release.; Inventory endpoints and managed images for Firefox versions older than 57.; Review Mozilla MFSA-2017-24 and Bugzilla 1358009 for vendor context..

Prepared

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
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

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MozillaFirefoxunspecifiedListed
Weakness

CWE details

No CWE listed

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