Is CVE-2015-6144 in the CISA KEV catalog?

No. CVE-2015-6144 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-6144?

CVE-2015-6144 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2015-6144?

CVE-2015-6144 has an EPSS score of 13.39% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2015-6144

MEDIUMEPSS 96th pctl

4.3

CVSS v2

NVD

Description

Microsoft Internet Explorer 8 through 11 and Microsoft Edge mishandle HTML attributes in HTTP responses, which allows remote attackers to bypass a cross-site scripting (XSS) protection mechanism via unspecified vectors, aka "Microsoft Browser XSS Filter Bypass Vulnerability."

CWE-79Cross-Site Scripting (XSS)

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

13.39%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% 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 2026-05-06.