Is CVE-2011-1774 in the CISA KEV catalog?

No. CVE-2011-1774 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-1774?

CVE-2011-1774 has a CVSS v2 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2011-1774?

CVE-2011-1774 has an EPSS score of 43.20% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2011-1774

HIGHEPSS 99th pctl

8.8

CVSS v2

NVD

Description

WebKit in Apple Safari before 5.0.6 has improper libxslt security settings, which allows remote attackers to create arbitrary files, and consequently execute arbitrary code, via a crafted web site. NOTE: this may overlap CVE-2011-1425.

CWE-20Improper Input Validation

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

43.20%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

http://lists.apple.com/archives/Security-announce/2011//Oct/msg00000.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html
http://lists.apple.com/archives/security-announce/2011//Jul/msg00002.html
http://securityreason.com/securityalert/8481
http://support.apple.com/kb/HT4808
http://support.apple.com/kb/HT4981
http://support.apple.com/kb/HT4999

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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 2026-04-29.