CVE-2009-0777
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…
Does this matter?
Lower severity and a low EPSS score (1.50%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 2.0
- 5.8 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:P
- EPSS
- 1.50% probability · 74th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- mozilla/firefox · mozilla/seamonkey · mozilla/thunderbird
- Source
- secalert@redhat.com
EPSS 1.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00002.html
- http://secunia.com/advisories/34140Vendor Advisory
- http://secunia.com/advisories/34145Vendor Advisory
- http://secunia.com/advisories/34272Vendor 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.htmlVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2009-0315.html
- http://www.securityfocus.com/bid/33990
- http://www.vupen.com/english/advisories/2009/0632Vendor 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
- http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00002.html
- http://secunia.com/advisories/34140Vendor Advisory
- http://secunia.com/advisories/34145Vendor Advisory
- http://secunia.com/advisories/34272Vendor 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.htmlVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2009-0315.html
- http://www.securityfocus.com/bid/33990
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.