CVE-2009-4100
Yoono extension before 6.1.1 for Firefox performs certain operations with chrome privileges,...
CVE-2009-4100 is a high vulnerability (CVSS 9.3) in Yoono, published November 28, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.87%, the 90th percentile. No source names a fixed version.
Yoono extension before 6.1.1 for Firefox performs certain operations with chrome privileges, which allows user-assisted remote attackers to execute arbitrary commands and perform cross-domain scripting attacks via DOM event handlers such as onload.
Exploit likelihood
What each source reports
NVD Score used
Yoono extension before 6.1.1 for Firefox performs certain operations with chrome privileges, which allows user-assisted remote attackers to execute arbitrary commands and perform cross-domain scripting attacks via DOM event handlers such as onload.
- Record
CVE-2009-4100- CVSS 2.0
- 9.3 High
AV:N/AC:M/Au:N/C:C/I:C/A:C - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List No score
Yoono extension before 6.1.1 for Firefox performs certain operations with chrome privileges, which allows user-assisted remote attackers to execute arbitrary commands and perform cross-domain scripting attacks via DOM event handlers such as onload.
- Record
CVE-2009-4100- Updated
- 2026-11-02
EUVDEUVD-2009-4071 No score
Yoono extension before 6.1.1 for Firefox performs certain operations with chrome privileges, which allows user-assisted remote attackers to execute arbitrary commands and perform cross-domain scripting attacks via DOM event handlers such as onload.
- Record
EUVD-2009-4071- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-f998-p46x-w444 No score
Yoono extension before 6.1.1 for Firefox performs certain operations with chrome privileges,...
Yoono extension before 6.1.1 for Firefox performs certain operations with chrome privileges, which allows user-assisted remote attackers to execute arbitrary commands and perform cross-domain scripting attacks via DOM event handlers such as onload.
- Record
GHSA-f998-p46x-w444- Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD |
References
securityfocus.com/bid/37123
vupen.com/english/advisories/2009/3326
addons.mozilla.org/en-US/firefox/addons/versions/1833
exchange.xforce.ibmcloud.com/vulnerabilities/54417
net-security.org/secworld.php?id=8527
secunia.com/advisories/37468
nvd.nist.gov/vuln/detail/CVE-2009-4100
github.com/advisories/GHSA-f998-p46x-w444