Security readout for executives and security teams
CVE-2017-7816 is a Firefox WebExtensions issue where extension UI elements could load privileged about: URLs despite checks meant to block that behavior. The provided sources identify Firefox versions before 56 as affected, but do not provide CVSS scoring or confirmed exploitation. Exposure is most likely in legacy environments running Firefox before 56, including unmanaged endpoints, old images, kiosks, or test systems. Modern supported Firefox deployments should not be assumed affected based on the provided version boundary. Handle this as legacy browser risk. It is not supported by the provided sources as an active exploitation emergency, but any Firefox before 56 should be removed or upgraded because it is far outside supported security baselines. Mitigation focus: Upgrade Firefox to version 56 or a currently supported release.; Remove unsupported Firefox versions from managed endpoints and base images.; Review Mozilla advisory MFSA2017-21 for vendor guidance..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2017-7816 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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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/mfsa2017-21/CVE reference · x_refsource_CONFIRM
- https://bugzilla.mozilla.org/show_bug.cgi?id=1380597CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
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