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5.1

Firefox and Thunderbird can be tricked into installing software

CVE-2004-0909 · published 21 years ago
Summary

Older versions of Firefox (before the preview release) and Thunderbird (before version 0.8) let a malicious webpage ask for extra permissions and then change security prompts. This can cause users to unknowingly install unwanted programs. Upgrade to the latest Firefox and Thunderbird releases to stop this behavior.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
mozilla mozilla 0.8
0.9.2
0.9.2.1
0.9.3
0.9.4
0.9.4.1
0.9.5
0.9.6
0.9.7
0.9.8
0.9.9
0.9.35
19 more version ranges
cpe:2.3:a:mozilla:mozilla:0.8:*:*:*:*:*:*:*
mozilla thunderbird 0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.7.1
0.7.2
cpe:2.3:a:mozilla:thunderbird:0.1:*:*:*:*:*:*:*
Original advisory text
Mozilla Firefox before the Preview Release, Mozilla before 1.7.3, and Thunderbird before 0.8 may allow remote attackers to trick users into performing unexpected actions, including installing softw...
Mozilla Firefox before the Preview Release, Mozilla before 1.7.3, and Thunderbird before 0.8 may allow remote attackers to trick users into performing unexpected actions, including installing software, via signed scripts that request enhanced abilities using the enablePrivilege parameter, then modify the meaning of certain security-relevant dialog messages.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.1 Medium
Exploitation
2% chance of attack within 30 days
Timeline
Published31 Dec 2004
Updated3 Nov 2026
First seen29 Sep 2026
Sources
CVE-2004-0909 · NVD
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