CVE-2005-2089

Internet Information Services vulnerability

CVSS

4.3

EPSS

31.0%

EPSS pct

98th

Exploited

No known

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 vendor

Microsoft

Affected product

Internet Information Services

CVSS vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Weakness type (CWE)

CWE-444 — HTTP Request Smuggling

Published

2005-07-05

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to integrity.

Its EPSS score of 31.0% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2005-2089

Confirm whether Microsoft Internet Information Services is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2005-2089.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2005-2089

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2005-2089 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2005-2089?

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