What’s Vulnerable › Vulnerabilities

CVE-2009-4074

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 14.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2009-11-25 · updated 2026-06-16

Description

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."

Affected products

• Microsoft Internet Explorer 11: 8

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
• 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

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