Security readout for executives and security teams
CVE-2017-5393 is a Firefox add-on installation trust issue. In Firefox versions before 51, Mozilla’s mozAddonManager could allow extension installation from the public addons.mozilla.org CDN. With an XSS issue on Mozilla AMO sites, a malicious extension could install additional extensions. Evidence is limited to vendor and vulnerability database references. Exposure is most likely limited to legacy Firefox installations older than version 51. Modern supported Firefox deployments are unlikely to be affected based on the stated affected range, but inventories should confirm browser versions and any unmanaged legacy systems. Treat this as a legacy browser hygiene issue rather than an emergency. Prioritize confirming no Firefox versions below 51 remain in business environments, especially on unmanaged endpoints, lab systems, or legacy application workstations. Mitigation focus: Upgrade Firefox installations to a supported release, or at minimum version 51 or later.; Identify and retire unmanaged Firefox versions older than 51.; Review installed extensions for untrusted or unexpected add-ons..
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-2017-5393 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://bugzilla.mozilla.org/show_bug.cgi?id=1309282CVE reference · x_refsource_CONFIRM
- https://www.mozilla.org/security/advisories/mfsa2017-01/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
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