CVE-2009-1840

Severity: critical (CVSS 9.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-06-12 · updated 2026-06-16
Weakness: CWE-264

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.

Affected products

Mozilla Firefox: through 3.0.10; 3.0, 3.0-alpha, 3.0-beta2, 3.0-beta5, 3.0.1, 3.0.2 (+9)
Mozilla Seamonkey: all versions
Mozilla Thunderbird: all versions

References

http://osvdb.org/55158
http://secunia.com/advisories/35331
http://secunia.com/advisories/35415
http://secunia.com/advisories/35431
http://secunia.com/advisories/35439
http://secunia.com/advisories/35440
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.html

Get alerted when CVE-2009-1840 or the next vulnerability affects your stack