CVE-2017-5382: Mozilla Firefox vulnerability

CVE-2017-5382: Feed preview for RSS feeds can be used to capture errors and exceptions generated by privileged content, al...

Feed preview for RSS feeds can be used to capture errors and exceptions generated by privileged content, allowing for the exposure of internal information not meant to be seen by web content. This vulnerability affects Firefox < 51.

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

Security readout for executives and security teams

Firefox versions before 51 could let a web page use RSS feed preview behavior to see internal error or exception details from privileged browser content. The issue is an information disclosure flaw, not documented here as code execution. Business risk mainly exists where very old Firefox builds remain in use. Exposure is limited to Mozilla Firefox versions before 51. Modern, auto-updated browser fleets are unlikely to be exposed. Legacy desktops, kiosks, lab systems, or frozen virtual machine images are the most plausible remaining risk. Treat as a legacy-browser cleanup item unless Firefox < 51 is present. If found on production or kiosk systems, prioritize removal because browser information disclosure can support broader attack chains. Mitigation focus: Upgrade any Firefox installation below version 51 to a supported current release.; Review Mozilla advisory MFSA2017-01 for vendor guidance.; Remove or isolate unsupported legacy Firefox builds from production environments..

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://bugzilla.mozilla.org/show_bug.cgi?id=1295322CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2017-01/CVE 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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