# CVE-2025-71334: Flowise - LFI

> Live exploitation tracking for CVE-2025-71334 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2025-71334

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 9.3
- **Public exploit available:** Yes
- **Affected products:** Flowise
- **Weaknesses:** CWE-73 (External Control of File Name or Path)
- **Tags:** web_application, nodejs, ai_mcp

## Description

Flowise before 3.0.6 (affected versions 2.2.8 and earlier) contains an arbitrary file access vulnerability due to missing validation that the chatflowId and chatId parameters are UUIDs or numbers in file handling operations. By supplying a path-traversal value (e.g., '../../../../../tmp') as the chatflow id, an unauthenticated attacker can use the /api/v1/chatflows endpoint (via addBase64FilesToStorage) to write arbitrary files, and the /api/v1/get-upload-file and /api/v1/openai-assistants-file/download endpoints (via streamStorageFile) to read arbitrary files. Arbitrary file write may lead to remote code execution.

## CrowdSec analysis

[CVE-2025-71334](https://euvd.enisa.europa.eu/vulnerability/CVE-2025-71334) is a critical arbitrary file access vulnerability in Flowise before 3.0.6, caused by insufficient validation of chatflow and chat identifiers. Unauthenticated remote attackers can exploit path traversal to read sensitive files or write arbitrary files through exposed API endpoints, potentially enabling remote code execution and full compromise of the affected server.

CrowdSec has been tracking this vulnerability and its exploits since 3rd of August 2026.

CrowdSec network observations suggest that most exploitation of CVE-2025-71334 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental.
Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2025-71334. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.

Attackers target the `/api/v1/chatflows` endpoint with a JSON `id` containing directory traversal sequences such as `../../../../../../../../tmp`. The crafted `flowData` embeds a data URI and filename, abusing insufficient path validation to write files outside the intended storage directory; requests commonly include `Content-Type: application/json` and `x-request-from: internal`.

## Timeline

- 2026-06-25: CVE Published. CVE-2025-71334 is published to NVD.
- 2026-08-03: Rule Released. CrowdSec releases a rule to detect CVE-2025-71334 exploitation attempts against the CrowdSec Network.
- 2026-09-05: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2025-71334 for the first time.

## References

- https://www.vulncheck.com/advisories/flowise-arbitrary-file-access-via-missing-chat-flow-id-validation
- https://github.com/FlowiseAI/Flowise/commit/c2b830f279e454e8b758da441016b2234f220ac7
- https://github.com/FlowiseAI/Flowise/commit/8bd3de41533de78e4ef6c980e5704a1f9cb7ae6f
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-q67q-549q-p849
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-71334.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2025-71334) follows observed exploitation activity for CVE-2025-71334. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.