CVE-2017-7842: Mozilla Firefox vulnerability

CVE-2017-7842: If a document's Referrer Policy attribute is set to "no-referrer" sometimes two network requests are made f...

If a document's Referrer Policy attribute is set to "no-referrer" sometimes two network requests are made for "<link>" elements instead of one. One of these requests includes the referrer instead of respecting the set policy to not include a referrer on requests. This vulnerability affects Firefox < 57.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 16:19 UTC (UTC+00:00)

Security readout for executives and security teams

Firefox versions before 57 could ignore a page’s no-referrer policy for some link-related requests. That means a destination site might receive the previous page address even when the page explicitly requested no referrer disclosure. The main business risk is privacy leakage, not system takeover. Exposure is mainly legacy endpoints where users still browse with Firefox versions older than 57. Modern, patched Firefox versions are not identified as affected in the provided sources. Treat as a legacy-browser privacy exposure. It is not described as remote code execution, but organizations with old Firefox installations should remediate because referrer leakage can expose sensitive navigation or URL data. Mitigation focus: Upgrade Firefox clients to version 57 or later.; Follow Mozilla MFSA2017-24 guidance for affected Firefox deployments.; Inventory managed browsers for Firefox versions below 57..

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/mfsa2017-24/CVE reference · x_refsource_CONFIRM
https://bugzilla.mozilla.org/show_bug.cgi?id=1397064CVE 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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