Which products and versions are affected by CVE-2011-1774?

Affected: Safari (Apple) versions 1.0, 1.0.0, 1.0.0b1, 1.0.0b2, 1.0.1, 1.0.2, 1.0.3, 1.0.3-85.8; Webkit (Apple). The full list is in the CVE brief.

Is CVE-2011-1774 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

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

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2011-1774?

Public exploit code is available.

Is there a fix for CVE-2011-1774?

Fixed versions are available, including Safari 5.0.5.

How urgently should CVE-2011-1774 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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Emerging threatsHigh

CVE-2011-1774Safari Vulnerability

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.

Published Jul 21, 2011 · Updated Apr 28, 2026

Key Facts

Patch immediately

CVE-2011-1774 is a high-severity vulnerability (CVSS 8.8 v2) affecting Safari (Apple), Webkit (Apple).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 43% probability of exploitation in the next 30 days.
Fixed versions are available, including Safari 5.0.5.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v2

8.8

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

EPSS (30-day exploit likelihood)

43%

Higher than 98.7% of all scored CVEs

Exploit maturity

Weaponized

ATLAS score

55/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Weaponized

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

advisoryhttp://support.apple.com/kb/HT4808
patchAPPLE-SA-2011-07-20-1

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.

Affected Products

67 affected entries in total

Product	Affected versions	Fixed in
SafariApple	1.0, 1.0.0, 1.0.0b1, 1.0.0b2, 1.0.1, 1.0.2, 1.0.3, 1.0.3-85.8	5.0.5
WebkitApple	See advisory	n/a

Patched Releases

Safari

5.0.5

Timeline

Publicly disclosed
Jul 21, 2011
Last updated
Apr 28, 2026

Weakness Type

CWE-20 Improper Input Validation

References

4 more references in the full CVE brief

FAQ

Common Questions.

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.
Affected: Safari (Apple) versions 1.0, 1.0.0, 1.0.0b1, 1.0.0b2, 1.0.1, 1.0.2, 1.0.3, 1.0.3-85.8; Webkit (Apple). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Safari 5.0.5.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2011-1774 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.