CVE-2009-0777
MEDIUM · CVSS 5.8EPSS 1.5%EU EUVD
Mozilla Firefox before 3.0.7, Thunderbird before 2.0.0.21, and SeaMonkey before 1.1.15 decode invisible characters when they are displayed in the location bar, which causes an incorrect address to be displayed and makes it easier for remote attackers to spoof URLs and conduct phishing attacks.
Key facts
- CVSS score
- 5.8 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:P/A:P- Weakness (CWE)
- CWE-20
- EPSS score
- 1.5% (74th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-0777)
- Published
- March 5, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-0777 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
and 38 more…
References
- http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00002.html
- http://secunia.com/advisories/34140(Vendor Advisory)
- http://secunia.com/advisories/34145(Vendor Advisory)
- http://secunia.com/advisories/34272(Vendor Advisory)
- http://securitytracker.com/alerts/2009/Mar/1021799.html
- http://support.avaya.com/elmodocs2/security/ASA-2009-069.htm
- http://support.avaya.com/japple/css/japple?temp.documentID=366362&temp.productID=154235&temp.releaseID=361845&temp.bucketID=126655&PAGE=Document
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:075
- http://www.mozilla.org/security/announce/2009/mfsa2009-11.html(Vendor Advisory)
- http://www.redhat.com/support/errata/RHSA-2009-0315.html
- http://www.securityfocus.com/bid/33990
- http://www.vupen.com/english/advisories/2009/0632(Vendor Advisory)
- https://bugzilla.mozilla.org/show_bug.cgi?id=452979
- https://exchange.xforce.ibmcloud.com/vulnerabilities/49087
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11222
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6039
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6157
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6229
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7435
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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