WebKit in Apple Safari before 5.0.6 has improper libxslt security settings, which allows remote attackers to create arbitrary files, and con
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.
- Published
- Jul 21, 2011
- Updated
- Jun 16, 2026
- EPSS
- 43.2% · 99th percentile
- CWE
- CWE-20
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Report tools
Action score
48
Plan
Add it to your regular patch cycle.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 13 / 30 · 43.2%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| apple | safari | cpe:2.3:a:apple:safari |
| apple | webkit | cpe:2.3:a:apple:webkit |
| apple | mac os x | cpe:2.3:o:apple:mac_os_x |
| apple | mac os x server | cpe:2.3:o:apple:mac_os_x_server |
| microsoft | windows 7 | cpe:2.3:o:microsoft:windows_7 |
| microsoft | windows vista | cpe:2.3:o:microsoft:windows_vista |
| microsoft | windows xp | cpe:2.3:o:microsoft:windows_xp |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apple safariup to 5.0.5 inclusive
- apple safari1.0
- apple safari1.0.0
- apple safari1.0.0b1
- apple safari1.0.0b2
- apple safari1.0.1
- apple safari1.0.2
- apple safari1.0.3
- apple safari1.1
- apple safari1.1.0
- apple safari1.1.1
- apple safari1.2
- apple safari1.2.0
- apple safari1.2.1
- apple safari1.2.2
- apple safari1.2.3
- apple safari1.2.4
- apple safari1.2.5
- apple safari1.3
- apple safari1.3.0
Same product
apple: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-28205A use after free issue was addressed with improved memory management.KEV73This week
- CVE-2023-32439A type confusion issue was addressed with improved checks.KEV72This week
- CVE-2023-32435A memory corruption issue was addressed with improved state management.KEV72This week
- CVE-2025-24201An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions.KEV71This week
- CVE-2023-37450The issue was addressed with improved checks.KEV71This week
- CVE-2022-22620A use after free issue was addressed with improved memory management.KEV70This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×2
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2011-10-18 |
| Metasploit module | auxiliary/server/webkit_xslt_dropperCross Platform Webkit File Dropperauxiliary | — |
| Metasploit module | exploit/windows/browser/safari_xslt_outputApple Safari Webkit libxslt Arbitrary File Creationexploit | 2011-07-20 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Metasploit-2 d
- Published
- First PoC+88 d
- TodaySep 30, 2026+5549 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- none
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- None
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
AV:N/AC:M/Au:N/C:N/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- lists.apple.com/archives/Security-announce/2011//Oct/msg00000.html
- lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html
- lists.apple.com/archives/security-announce/2011//Jul/msg00002.html
- securityreason.com/securityalert/8481
- support.apple.com/kb/HT4808
- support.apple.com/kb/HT4981
- support.apple.com/kb/HT4999
Vendor advisories and official records. Exploit/PoC links are deliberately left out.