# CVE-2026-124500: Fengoffice Feng Office File FilesController.class.php upload_document_image server-side request forgery

Status: published. Published: 2026-11-08. Updated: 2026-11-08.

A security flaw has been discovered in Fengoffice Feng Office up to 3.11.13.11/4.2.1.2. This impacts the function upload_document_image of the file application/controllers/FilesController.class.php of the component File Handler. The manipulation of the argument url results in server-side request forgery. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Fengoffice / Feng Office: 3.11.13.0 (affected); 3.11.13.1 (affected); 3.11.13.2 (affected); 3.11.13.3 (affected); 3.11.13.4 (affected); 3.11.13.5 (affected); 3.11.13.6 (affected); 3.11.13.7 (affected); 3.11.13.8 (affected); 3.11.13.9 (affected); 3.11.13.10 (affected); 3.11.13.11 (affected); 4.2.1.0 (affected); 4.2.1.1 (affected); 4.2.1.2 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 6.3 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 6.3 (medium); CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 6.5 (medium); AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-918

## Exploit evidence

- exploit: https://gist.github.com/Marsh232/ae7fc1a7b4ad151128e6cd4e0db6cf02 (CNA: VulDB)

## References

- https://vuldb.com/vuln/432805 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/432805/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-124500 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1033342 (CNA: VulDB; third-party-advisory)

- https://gist.github.com/Marsh232/ae7fc1a7b4ad151128e6cd4e0db6cf02 (CNA: VulDB; exploit)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-124500; retrieved 2026-11-09; source updated 2026-11-08

Revision: 0bb018a8e9874ba3c579778cb496771b1a04ac7615abd12354c1f52888130676

Canonical: https://y2.dev/cve/CVE-2026-124500

## Agent and API access

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- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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