CVE-2011-3866
Mozilla Firefox before 7.0 and SeaMonkey before 2.4 do not properly restrict availability of...
Mozilla Firefox before 7.0 and SeaMonkey before 2.4 do not properly restrict availability of motion data events, which makes it easier for remote attackers to read keystrokes by leveraging JavaScript code running in a background tab.
Exploit likelihood
What each source reports
NVD Score used
Mozilla Firefox before 7.0 and SeaMonkey before 2.4 do not properly restrict availability of motion data events, which makes it easier for remote attackers to read keystrokes by leveraging JavaScript code running in a background tab.
- Record
CVE-2011-3866- CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-264
- Updated
- 2026-11-02
CVE List No score
Mozilla Firefox before 7.0 and SeaMonkey before 2.4 do not properly restrict availability of motion data events, which makes it easier for remote attackers to read keystrokes by leveraging JavaScript code running in a background tab.
- Record
CVE-2011-3866- Updated
- 2026-11-02
EUVDEUVD-2011-3823 No score
Mozilla Firefox before 7.0 and SeaMonkey before 2.4 do not properly restrict availability of motion data events, which makes it easier for remote attackers to read keystrokes by leveraging JavaScript code running in a background tab.
- Record
EUVD-2011-3823- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4wmv-p7gx-jgg9 No score
Mozilla Firefox before 7.0 and SeaMonkey before 2.4 do not properly restrict availability of...
Mozilla Firefox before 7.0 and SeaMonkey before 2.4 do not properly restrict availability of motion data events, which makes it easier for remote attackers to read keystrokes by leveraging JavaScript code running in a background tab.
- Record
GHSA-4wmv-p7gx-jgg9- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2011-3866 is a medium vulnerability (CVSS 4.3) in Mozilla Firefox, published September 29, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.37%, the 71st percentile. No source names a fixed version.