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CVE-2009-3986

24
FAUCET Score

CVE-2009-3986 describes a critical vulnerability in Mozilla Firefox versions prior to 3.0.16 and 3.5.6, and SeaMonkey before 2.0.1. This flaw allows remote attackers to execute arbitrary JavaScript with elevated chrome privileges by manipulating the window.opener property to reference a chrome window from a content window. With a CVSS score of 7.6, this vulnerability is highly severe due to its network-based attack vector, high impact on confidentiality, integrity, and availability, despite requiring high attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.15CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.1:*:*:*:*:*:*:*
0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.2:*:*:*:*:*:*:*
0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.3:*:*:*:*:*:*:*
0.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.6HIGH

AV:N/AC:H/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.71%
Probability of exploitation in next 30 days
EPSS Percentile
88.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0371 is in the 49th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.0.16-4.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.0.16-1.el5_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.0.16-2.el5_4
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2009-3986Moderate

Mozilla Chrome privilege escalation via window.opener

Dec 15, 2009

References

bugzilla.mozilla.org / show_bug.cgi
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/37699
Vendor Advisory
secunia.com / advisories/37704
Vendor Advisory
secunia.com / advisories/37785
Vendor Advisory
secunia.com / advisories/37813
secunia.com / advisories/37856
secunia.com / advisories/37881
securitytracker.com / id
Patch
securitytracker.com / id
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/54803
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11568
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8489
rhn.redhat.com / errata/RHSA-2009-1674.html
redhat.com / archives/fedora-package-announce/2009-December/msg00995.html
redhat.com / archives/fedora-package-announce/2009-December/msg01034.html
redhat.com / archives/fedora-package-announce/2009-December/msg01041.html
debian.org / security/2009/dsa-1956
mozilla.org / security/announce/2009/mfsa2009-70.html
Vendor Advisory
novell.com / linux/security/advisories/2009_63_firefox.html
securityfocus.com / bid/37349
securityfocus.com / bid/37365
ubuntu.com / usn/USN-873-1
ubuntu.com / usn/USN-874-1
vupen.com / english/advisories/2009/3547
PatchVendor Advisory