Is CVE-2005-4827 in the CISA KEV catalog?

No. CVE-2005-4827 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2005-4827?

CVE-2005-4827 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2005-4827?

CVE-2005-4827 has an EPSS score of 10.76% (95th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2005-4827

HIGHEPSS 95th pctl

7.5

CVSS v2

NVD

Description

Internet Explorer 6.0, and possibly other versions, allows remote attackers to bypass the same origin security policy and make requests outside of the intended domain by calling open on an XMLHttpRequest object (Microsoft.XMLHTTP) and using tab, newline, and carriage return characters within the first argument (method name), which is supported by some proxy servers that convert tabs to spaces. NOTE: this issue can be leveraged to conduct referer spoofing, HTTP Request Smuggling, and other attacks.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

10.76%probability of exploitation in 30 days

95thpercentile

Very high risk: more likely to be exploited than 95% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.