Security readout for executives and security teams
Plain-English summary
CVE-2019-11697 is a Firefox UI security flaw. If a user received an extension installation prompt and pressed ALT+a, the normal prompt delay could be bypassed, allowing installation sooner than intended. A malicious page could combine this with spoofing to trick a user into installing a malicious extension. The source bundle says Firefox before 67 is affected.
Executive priority
Treat this as a cleanup and browser governance issue, not an emergency based on the supplied evidence. Prioritize remediation where legacy Firefox remains in production or users can install extensions freely.
Technical view
The issue is in Firefox's extension installation prompt handling. The prompt delay that prevents immediate acceptance could be skipped when ALT and a were pressed. This does not describe remote code execution by itself; the documented risk is malicious extension installation through user deception. Sources identify Firefox versions before 67 as affected.
Likely exposure
Exposure is mainly legacy Firefox installations older than version 67. Organizations with unmanaged browsers, old gold images, kiosks, or unsupported endpoints are more likely to retain exposure.
Exploitation context
The bundle does not show active exploitation and KEV is false. Exploitation requires a user-facing extension install prompt plus social engineering or page spoofing to induce the relevant keyboard action.
Researcher notes
Evidence is limited to the CVE description, Mozilla advisory reference, and Bugzilla reference. The bundle provides no CVSS score, CWE, exploit proof, or workaround details beyond affected Firefox versions before 67.
Mitigation direction
- Upgrade Firefox to version 67 or later, preferably a currently supported release.
- Audit managed endpoints for Firefox versions older than 67.
- Restrict extension installation through enterprise browser policy where appropriate.
- Review Mozilla guidance for any environment-specific remediation details.
Validation and detection
- Inventory Firefox versions across workstations, kiosks, and VDI images.
- Confirm no production endpoint is running Firefox before version 67.
- Check enterprise policies controlling browser extension installation.
- Review helpdesk or EDR telemetry for suspicious extension installation reports.
Public sources used
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
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-2019-11697 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
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/mfsa2019-13/CVE reference · x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1440079CVE reference · x_refsource_MISC
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.