CVE-2009-4074
The XSS Filter in Microsoft Internet Explorer 8 allows remote attackers to leverage the "response-changing mechanism" to conduct cross-site scripting (XSS) attacks against web sites that have no inherent XSS vulnerabilities, related to the details of output encoding and improper modification of an HTML attribute, aka "XSS Filter Script Handling Vulnerability."
Key facts
- CVSS score
- 4.3 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:P/A:N- EPSS score
- 14.8% (97th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-4045)
- Published
- November 25, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-4045 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- microsoft / internet explorer
References
- http://hackademix.net/2009/11/21/ies-xss-filter-creates-xss-vulnerabilities/
- http://www.owasp.org/images/5/50/OWASP-Italy_Day_IV_Maone.pdf
- http://www.securityfocus.com/bid/37135
- http://www.theregister.co.uk/2009/11/20/internet_explorer_security_flaw/
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-002
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7715
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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