VULNERABILITY INTELLIGENCE
CVE-2009-4630
CVSS score5 MEDIUM
EPSS probability1.03%
CISA KEVNot currently listed
Published2010-01-29
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:N/A:N
Description
Mozilla Necko, as used in Firefox, SeaMonkey, and other applications, performs DNS prefetching of domain names contained in links within local HTML documents, which makes it easier for remote attackers to determine the network location of the application's user by logging DNS requests. NOTE: the vendor disputes the significance of this issue, stating "I don't think we necessarily need to worry about that case."
Weakness classification
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor