What’s Vulnerable › Vulnerabilities

CVE-2005-2089

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 31.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2005-06-30 · updated 2026-06-16
• Weakness: CWE-444

Description

Microsoft IIS 5.0 and 6.0 allows remote attackers to poison the web cache, bypass web application firewall protection, and conduct XSS attacks via an HTTP request with both a "Transfer-Encoding: chunked" header and a Content-Length header, which causes IIS to incorrectly handle and forward the body of the request in a way that causes the receiving server to process it as a separate HTTP request, aka "HTTP Request Smuggling."

Affected products

• Microsoft IIS: 5.0, 6.0

References

• http://seclists.org/lists/bugtraq/2005/Jun/0025.html
• http://www.securiteam.com/securityreviews/5GP0220G0U.html
• http://www.watchfire.com/resources/HTTP-Request-Smuggling.pdf
• https://exchange.xforce.ibmcloud.com/vulnerabilities/42899
• http://seclists.org/lists/bugtraq/2005/Jun/0025.html
• http://www.securiteam.com/securityreviews/5GP0220G0U.html
• http://www.watchfire.com/resources/HTTP-Request-Smuggling.pdf
• https://exchange.xforce.ibmcloud.com/vulnerabilities/42899

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