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Wolf CMS EUVDEUVD-2026-51291

| CVE-2026-67206 HIGH
Unrestricted Upload of File with Dangerous Type (CWE-434)
2026-07-30 VulnCheck GHSA-3pqf-wrr6-rf9m
PHP File Upload RCE Wolfcms
8.7
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
8.8 HIGH

Network-reachable file manager, low complexity, but requires an authenticated account with the file_manager_mkfile capability so PR:L; webshell execution yields full C/I/A on the host.

3.1 AV:N/AC:L/PR:L/UI:N/S:N/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Jul 30, 2026 - 20:51 vuln.today
CVE Published
Jul 30, 2026 - 19:27 cve.org
HIGH 8.7

DescriptionCVE.org

Wolf CMS through 0.8.3.1 contains a remote code execution vulnerability in FileManagerController that allows authenticated attackers to create arbitrary PHP files by exploiting missing file extension validation in the create_file() and save() functions. Attackers with the file_manager_mkfile capability can write malicious PHP content into the web-accessible FILES_DIR directory and trigger execution by requesting the file over HTTP.

AnalysisAI

Remote code execution in Wolf CMS through version 0.8.3.1 allows authenticated attackers holding the file_manager_mkfile capability to write arbitrary PHP files into the web-accessible FILES_DIR and execute them by requesting the file over HTTP. The flaw stems from missing file-extension validation in the FileManagerController create_file() and save() functions (CWE-434). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate with file_manager_mkfile capability
Delivery
Invoke create_file()/save() with .php filename
Exploit
Write PHP webshell into FILES_DIR
Execution
Request file over HTTP
Persist
PHP engine executes payload
Impact
Arbitrary code execution on server
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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated Wolf CMS account (PR:L) that holds the specific file_manager_mkfile capability granting access to the FileManagerController create_file()/save() functions; without that capability the attack cannot be initiated. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The signals are largely consistent and point to a genuine, actionable priority. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has obtained (or been granted) a Wolf CMS account carrying the file_manager_mkfile capability uses the file manager to create a new file named, for example, shell.php containing PHP webshell code, which the create_file()/save() logic accepts because it does not validate the extension. The attacker then requests that file directly over HTTP from within the web-accessible FILES_DIR, causing the server's PHP engine to execute the payload and granting arbitrary command execution. …
Remediation No vendor-released patch version is identified at time of analysis, so upgrade guidance cannot cite an exact fixed release; monitor the VulnCheck advisory (https://www.vulncheck.com/advisories/wolf-cms-authenticated-rce-via-filemanagercontroller-file-upload) for an official fix and apply it once published. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Audit all Wolf CMS instances for version 0.8.3.1 or earlier; immediately restrict the file_manager_mkfile capability to fully-trusted administrative accounts only through role-based access controls. …

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EUVD-2026-51291 vulnerability details – vuln.today
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