CVE-2016-2831: n/a vulnerability

CVE-2016-2831: Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2 do not ensure that the user approves the fulls...

Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2 do not ensure that the user approves the fullscreen and pointerlock settings, which allows remote attackers to cause a denial of service (UI outage), or conduct clickjacking or spoofing attacks, via a crafted web site.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 23:32 UTC (UTC+00:00)

Security readout for executives and security teams

This CVE affects old Mozilla Firefox releases that did not properly confirm fullscreen and pointer-lock permissions. A malicious website could disrupt the browser UI or mislead a user through spoofing or clickjacking. The sources do not indicate code execution or confirmed active exploitation. Exposure is mainly legacy endpoints running Firefox before 47.0 or Firefox ESR before 45.2, including distro-packaged builds covered by 2016 vendor advisories. Modern, supported Firefox installations should not be affected if updated beyond those fixed versions. Treat this as a legacy-browser hygiene issue with user-deception risk. Prioritize environments where old Firefox versions still access untrusted web content, but do not escalate as an actively exploited or code-execution emergency based on the provided sources. Mitigation focus: Upgrade Firefox to 47.0 or later.; Upgrade Firefox ESR to 45.2 or later.; Apply relevant Linux distribution security updates..

Prepared: Jun 13, 2026, 14:22 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 13, 2016, 10:00 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
RHSA-2016:1217CVE reference · vendor-advisory, x_refsource_REDHAT
https://bugzilla.mozilla.org/show_bug.cgi?id=1261933CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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