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5.0

Firefox versions before 22 can be tricked by fake URLs

CVE-2013-1699 · published 13 years ago
Summary

Firefox versions earlier than 22 may show deceptive web addresses that look like legitimate .com, .name, or .net sites. This could cause users to think they are on a trusted site while they are not. Upgrade Firefox to a newer version or apply the latest security updates to prevent this deception.

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 firefox <= 21.0
19.0
19.0.1
19.0.2
20.0
20.0.1
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Original advisory text
The Internationalized Domain Name (IDN) display algorithm in Mozilla Firefox before 22.0 does not properly handle the .com, .name, and .net top-level domains, which allows remote attackers to spoof...
The Internationalized Domain Name (IDN) display algorithm in Mozilla Firefox before 22.0 does not properly handle the .com, .name, and .net top-level domains, which allows remote attackers to spoof the address bar via unspecified homograph characters.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.0 Medium
Exploitation
2% chance of attack within 30 days
Type
CWE-310Cryptographic Issues
Timeline
Published26 Jun 2013
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2013-1699 · NVD
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