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Fencer Vulns
medium 6.8

CVE-2009-3985 json

Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, allows remote attackers to associate spoofed content with…

published 2009-12-17 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3956

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, allows remote attackers to associate spoofed content with an invalid URL by setting document.location to this URL, and then writing arbitrary web script or HTML to the associated blank document, a related issue to CVE-2009-2654.

Patch / fix

  • firefox RHEL 4 3.0.16-4.el4
  • firefox RHEL 5 3.0.16-1.el5_4
  • xulrunner RHEL 5 1.9.0.16-2.el5_4
  • xulrunner-devel-unstable RHEL 5 1.9.0.16-2.el5_4

red hat advisories RHSA-2009:1674

  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1

opensuse advisories openSUSE-SU-2024:10071-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-3985 updated cvss 4.3

Mozilla URL spoofing via invalid document.location

  • Red Hat Enterprise Linux (v. 5 server) firefox 3.0.16-1.el5_4, xulrunner 1.9.0.16-2.el5_4, xulrunner-devel-unstable 1.9.0.16-2.el5_4 Red Hat Enterprise Linux AS version 4 firefox 3.0.16-4.el4 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.0.16-1.el5_4, xulrunner 1.9.0.16-2.el5_4, xulrunner-devel-unstable 1.9.0.16-2.el5_4 Red Hat Enterprise Linux Desktop version 4 firefox 3.0.16-4.el4 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xulrunner 1.9.0.16-2.el5_4, xulrunner-devel-unstable 1.9.0.16-2.el5_4 Red Hat Enterprise Linux ES version 4 firefox 3.0.16-4.el4
    +1 more products
    Red Hat Enterprise Linux WS version 4 firefox 3.0.16-4.el4
    fixed: vendor fix RHSA-2009:1674

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.54% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.