CVE-2009-4074
CVE-2009-4074 is a medium-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 4.3. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation.
Key facts
- Severity: Medium (CVSS 2.0 base score 4.3)
- EPSS exploit prediction: 15% (96th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Internet Explorer
- Published:
- Last modified:
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."
Frequently asked questions
- What is 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."
- How severe is CVE-2009-4074?
- CVE-2009-4074 has a CVSS 2.0 base score of 4.3, rated medium severity.
- Is CVE-2009-4074 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2009-4074?
- CVE-2009-4074 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2009-4074?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2009-4074 published?
- CVE-2009-4074 was published on 2009-11-25 and last updated on 2026-06-16.
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
Affected products (1)
- cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*
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