CVE-2009-1840
Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before loading a script file into a XUL document, which allows remote attackers to bypass intended access restrictions via a crafted HTML document, as demonstrated by…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before loading a script file into a XUL document, which allows remote attackers to bypass intended access restrictions via a crafted HTML document, as demonstrated by a "web bug" in an e-mail message, or web script or an advertisement in a web page.
- CVSS 2.0
- 9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C
- EPSS
- 2.22% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- mozilla/firefox · mozilla/seamonkey · mozilla/thunderbird
- Source
- secalert@redhat.com
EPSS 2.2% 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://osvdb.org/55158
- http://secunia.com/advisories/35331Vendor Advisory
- http://secunia.com/advisories/35415
- http://secunia.com/advisories/35431Vendor Advisory
- http://secunia.com/advisories/35439Vendor Advisory
- http://secunia.com/advisories/35440Vendor Advisory
- http://secunia.com/advisories/35468
- http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.372468
- http://sunsolve.sun.com/search/document.do?assetkey=1-66-264308-1
- http://www.debian.org/security/2009/dsa-1820
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:141
- http://www.mozilla.org/security/announce/2009/mfsa2009-31.htmlVendor Advisory
- http://www.securityfocus.com/bid/35326Patch
- http://www.securitytracker.com/id?1022379
- http://www.vupen.com/english/advisories/2009/1572Patch, Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=477979
- https://bugzilla.redhat.com/show_bug.cgi?id=503582
- https://exchange.xforce.ibmcloud.com/vulnerabilities/51076
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9448
- https://rhn.redhat.com/errata/RHSA-2009-1095.html
- https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00574.html
- https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00657.html
- http://osvdb.org/55158
- http://secunia.com/advisories/35331Vendor Advisory
- http://secunia.com/advisories/35415
- http://secunia.com/advisories/35431Vendor Advisory
- http://secunia.com/advisories/35439Vendor Advisory
- http://secunia.com/advisories/35440Vendor Advisory
- http://secunia.com/advisories/35468
- http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.372468
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.