Security readout for executives and security teams
Firefox before version 55 could ignore HSTS when a site sent two Strict-Transport-Security headers. That weakens a browser safety feature meant to keep users on HTTPS. Business exposure is mainly legacy Firefox use combined with affected server header behavior. Likely limited to organizations still running Firefox versions earlier than 55, especially when accessing sites that emit duplicate Strict-Transport-Security headers. Treat as a legacy-client hygiene issue. Prioritize only if old Firefox remains in the environment or critical sites emit duplicate HSTS headers. Mitigation focus: Upgrade Firefox to version 55 or later where applicable.; Check Mozilla advisory guidance before relying on compensating controls.; Review public sites for duplicate Strict-Transport-Security headers..
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-2017-7789 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
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/mfsa2017-18/CVE reference · x_refsource_CONFIRM
- https://bugzilla.mozilla.org/show_bug.cgi?id=1074642CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.