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Fencer Vulns
medium 5.8

CVE-2009-2654 json

Mozilla Firefox before 3.0.13, and 3.5.x before 3.5.2, allows remote attackers to spoof the address bar, and possibly conduct phishing atta…

published 2009-08-03 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-2648

cvss
5.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.7%
EPSS 4.7% chance of exploitation in 30 days, percentile 91%
public exploits
1
Exploit-DB

Summary

Mozilla Firefox before 3.0.13, and 3.5.x before 3.5.2, allows remote attackers to spoof the address bar, and possibly conduct phishing attacks, via a crafted web page that calls window.open with an invalid character in the URL, makes document.write calls to the resulting object, and then calls the stop method during the loading of the error page.

Patch / fix

  • seamonkey RHEL 3 1.0.9-0.45.el3
  • seamonkey-nss RHEL 3 1.0.9-0.45.el3
  • seamonkey-chat RHEL 3 1.0.9-0.45.el3
  • seamonkey-mail RHEL 3 1.0.9-0.45.el3
  • seamonkey-nspr RHEL 3 1.0.9-0.45.el3
  • seamonkey-js-debugger RHEL 3 1.0.9-0.45.el3
  • seamonkey-dom-inspector RHEL 3 1.0.9-0.45.el3
  • seamonkey RHEL 4 1.0.9-48.el4_8

red hat advisories RHSA-2009:1432RHSA-2009:1431RHSA-2009:1430

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-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-2009-2654 updated cvss 4.3

firefox: URL bar spoofing vulnerability

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.45.el3, seamonkey-nss 1.0.9-0.45.el3, seamonkey-chat 1.0.9-0.45.el3, seamonkey-mail 1.0.9-0.45.el3, seamonkey-nspr 1.0.9-0.45.el3, seamonkey-js-debugger 1.0.9-0.45.el3, +1 more
    fixed: vendor fix RHSA-2009:1432
  • Red Hat Enterprise Linux (v. 5 server) nspr 4.7.5-1.el5_4, firefox 3.0.14-1.el5_4, xulrunner 1.9.0.14-1.el5_4, xulrunner-devel-unstable 1.9.0.14-1.el5_4
    fixed: vendor fix RHSA-2009:1430
  • Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.45.el3, seamonkey-nss 1.0.9-0.45.el3, seamonkey-chat 1.0.9-0.45.el3, seamonkey-mail 1.0.9-0.45.el3, seamonkey-nspr 1.0.9-0.45.el3, seamonkey-js-debugger 1.0.9-0.45.el3, +1 more
    fixed: vendor fix RHSA-2009:1432
  • Red Hat Enterprise Linux AS version 4 nspr 4.7.5-1.el4_8, firefox 3.0.14-1.el4, seamonkey 1.0.9-48.el4_8, seamonkey-chat 1.0.9-48.el4_8, seamonkey-mail 1.0.9-48.el4_8, seamonkey-js-debugger 1.0.9-48.el4_8, +1 more Red Hat Enterprise Linux Desktop (v. 5 client) nspr 4.7.5-1.el5_4, firefox 3.0.14-1.el5_4, xulrunner 1.9.0.14-1.el5_4, xulrunner-devel-unstable 1.9.0.14-1.el5_4 Red Hat Enterprise Linux Desktop version 4 nspr 4.7.5-1.el4_8, firefox 3.0.14-1.el4, seamonkey 1.0.9-48.el4_8, seamonkey-chat 1.0.9-48.el4_8, seamonkey-mail 1.0.9-48.el4_8, seamonkey-js-debugger 1.0.9-48.el4_8, +1 more Red Hat Enterprise Linux Desktop Workstation (v. 5 client) nspr 4.7.5-1.el5_4, xulrunner 1.9.0.14-1.el5_4, xulrunner-devel-unstable 1.9.0.14-1.el5_4
    fixed: vendor fix RHSA-2009:1430
  • Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.45.el3, seamonkey-nss 1.0.9-0.45.el3, seamonkey-chat 1.0.9-0.45.el3, seamonkey-mail 1.0.9-0.45.el3, seamonkey-nspr 1.0.9-0.45.el3, seamonkey-js-debugger 1.0.9-0.45.el3, +1 more
    fixed: vendor fix RHSA-2009:1432
  • Red Hat Enterprise Linux ES version 4 nspr 4.7.5-1.el4_8, firefox 3.0.14-1.el4, seamonkey 1.0.9-48.el4_8, seamonkey-chat 1.0.9-48.el4_8, seamonkey-mail 1.0.9-48.el4_8, seamonkey-js-debugger 1.0.9-48.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1430
  • Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.45.el3, seamonkey-nss 1.0.9-0.45.el3, seamonkey-chat 1.0.9-0.45.el3, seamonkey-mail 1.0.9-0.45.el3, seamonkey-nspr 1.0.9-0.45.el3, seamonkey-js-debugger 1.0.9-0.45.el3, +1 more
    fixed: vendor fix RHSA-2009:1432
  • Red Hat Enterprise Linux WS version 4 nspr 4.7.5-1.el4_8, firefox 3.0.14-1.el4, seamonkey 1.0.9-48.el4_8, seamonkey-chat 1.0.9-48.el4_8, seamonkey-mail 1.0.9-48.el4_8, seamonkey-js-debugger 1.0.9-48.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1430

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

Timeline

  1. First public exploit (EDB-33103)
  2. Published

Exploit prediction

4.75% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-33103 Mozilla Firefox 3.5.1 - Error Page Address Bar URI Spoofing remote, 2009-06-24
  • securityfocus.com http://www.securityfocus.com/bid/35803 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/archive/1/505242/30/0/threaded referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:N/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

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.