CVE-2026-86239 Details
Description
A vulnerability was identified in liufee FeehiCMS up to 2.1.1. The impacted element is the function UeditorAction::init of the file backend/widgets/ueditor/UeditorAction.php of the component UEditor Widget. The manipulation leads to unrestricted upload. Remote exploitation of the attack is possible. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.
A vulnerability allowing unrestricted file uploads has been identified in FeehiCMS versions through 2.1.1. The issue arises in the UEditor Widget component, specifically within the UeditorAction::init function of the file backend/widgets/ueditor/UeditorAction.php. This vulnerability is made possible by a misconfiguration in the AccessControl allowActions whitelist, which permits unauthenticated access to the UEditor file upload widget. As a result, attackers can exploit this flaw to upload files of various types, including potentially malicious ones, without any authentication.
To address this vulnerability, remove 'assets/*' from the AccessControl allowActions whitelist, add authentication checks to the UeditorAction, re-enable CSRF validation, restrict file uploads to necessary image formats only, and implement MIME type validation to ensure uploaded files are safe.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 7, 2026CISA-ADP
Assessed Sep 9, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/liufee/cms/issues/94 | [email protected] | Issue TrackingTechnical DescriptionVendor |
| https://github.com/yang5ynag/cve/blob/main/FEHI-001-UEditor-Unauthorized-File-Upload.md | [email protected] | ExploitRemedy |
| https://vuldb.com/cve/CVE-2026-86239 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/901833 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/399396 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/399396/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
| CWE-434 | Unrestricted Upload of File with Dangerous Type | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| liufee FeehiCMS | <= 2.1.1 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 9, 2026 | CVE Modified | CISA-ADP |
| Sep 7, 2026 | New CVE Received | [email protected] |