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CVE Record

CVE-2017-7830: The Resource Timing API incorrectly revealed navigations in cross-origin iframes.

The Resource Timing API incorrectly revealed navigations in cross-origin iframes. This is a same-origin policy violation and could allow for data theft of URLs loaded by users. This vulnerability affects Firefox < 57, Firefox ESR < 52.5, and Thunderbird < 52.5.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This flaw let a website learn URLs loaded inside cross-origin iframes through browser timing data. That breaks the same-origin boundary and could expose user browsing or application URLs. The bundle identifies affected Firefox, Firefox ESR, and Thunderbird versions from before the 2017 fixes.

Executive priority

Treat this as a legacy-software exposure issue. It is not listed as actively exploited in the provided sources, but affected systems could leak sensitive URLs across origin boundaries.

Technical view

Mozilla’s Resource Timing API handling incorrectly exposed navigation information for cross-origin iframes. The CVE describes a same-origin policy violation with potential URL data theft. Affected products are Firefox before 57, Firefox ESR before 52.5, and Thunderbird before 52.5.

Likely exposure

Exposure is mainly legacy endpoints, kiosk images, VDI pools, embedded desktops, or servers still running the affected Mozilla builds. Modern supported versions should not be assumed affected from these sources.

Exploitation context

The source bundle does not show CISA KEV listing, active exploitation, public exploit use, CVSS, or CWE data. Impact is privacy and data exposure rather than documented remote code execution.

Researcher notes

Evidence is limited to the CVE description and vendor advisories. The bundle confirms product/version thresholds and same-origin policy impact, but does not provide CVSS, exploit maturity, or deeper root-cause detail.

Mitigation direction

  • Upgrade Firefox to version 57 or later.
  • Upgrade Firefox ESR to version 52.5 or later.
  • Upgrade Thunderbird to version 52.5 or later.
  • Apply relevant Debian or Red Hat security updates where those packages are managed by the OS.
  • Retire unsupported legacy browser or mail-client images.

Validation and detection

  • Inventory installed Firefox, Firefox ESR, and Thunderbird versions across managed endpoints.
  • Check Linux package versions against Debian or Red Hat advisory fixed releases.
  • Review VDI, kiosk, and golden-image builds for frozen Mozilla versions.
  • Confirm browser and mail-client update channels are enabled and reporting current versions.
Prepared
Confidence
high
Sources
12

Public sources used

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

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2017-7830 mapping review

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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
12Source 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
MozillaFirefox ESRunspecifiedListed
MozillaThunderbirdunspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.