Vulnerability report

Active exploitation observed Confirmed confidence Not in CISA KEV

CVE-2025-71334

Flowise Arbitrary File Access Arbitrary File Access

Flowise · affected before 3.0.6

Watch CVE-2025-71334 Browse KEV feed
Severity
CVSS 9.3 · Critical
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
4.4%
First observed
03 Jul 2026
Last observed
15 Oct 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2025-71334 is an unauthenticated vulnerability affecting Flowise. Flowise before 3.0.6 (affected versions 2.2.8 and earlier) contains an arbitrary file access vulnerability due to missing validation that the...

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence.

Who is affected?

Flowise affected before 3.0.6.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Flowise Arbitrary File Access Arbitrary File Access

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.

Flowise Affected
Flowise
Before 3.0.6
Flowise Unaffected
Flowise
3.0.6
View vendor advisory (opens in new tab)
Published
25 Jun 2026
Exploitation Reported
03 Jul 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

nuclei_scanner

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

Previdian

Recorded 03 Jul 2026

Previdian independently recorded this as exploited after first seeing it in honeypot sensors.

Active exploitation observed

Previdian sensor

First observed 03 Jul 2026

Previdian first observed exploitation attempts targeting this vulnerability in our honeypot sensors.

Proof of concept available

Pruva

Recorded 28 Jul 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
Previdian Sensors First 2026-07-28 12:54 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Previdian sensors recorded exploitation attempts targeting this vulnerability. The cards and chart show volume, unique attackers, and daily activity.

22

Attempts observed

11

Unique attacker IPs

8

Attacker countries

CN · IL · MX · MY · SE · SG · UA · US

2

Sensors observed

CVE-2025-71334 exploitation attempts over the last 89 days

Daily events observed by Previdian sensors

Updated 17 Oct 2026

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3
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21 Jul 8 Aug 26 Aug 13 Sep 17 Oct

First observed 03 Jul 2026 · Last observed 15 Oct 2026

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
6
2
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-71334.yaml 31 Jul 2026

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

9.3 Critical

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS

4.4%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

External Control of File Name or Path CWE-73

All CVSS Scores

CVSS v4.0 9.3 Critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v3.1 9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Flowise arbitrary file access via unvalidated chatflowId/chatId

pruva · Created 2026-07-28 15:45:56 UTC

Severity: CRITICAL | CVE: CVE-2025-71334 | Package: FlowiseAI/Flowise

Flowise arbitrary file access via unvalidated chatflowId/chatId

pruva · Created 2026-07-28 15:45:56 UTC

Severity: CRITICAL | CVE: CVE-2025-71334 | Package: FlowiseAI/Flowise

Flowise - Path Traversal

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 04:30 UTC

    Nuclei template available

    Scanner coverage available

  2. 15:45 UTC

    Public PoC available

    Public proof-of-concept code published

  3. 09:04 UTC

    Indicators of compromise added (13)

    Indicators of compromise recorded

  4. 09:04 UTC

    Observed by Previdian sensors

    Evidence-backed exploitation signal

  5. 21:41 UTC

    CVE published

    Vulnerability disclosed publicly

  6. 01:48 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2025-71334

Sample API response 
{
  "cve_id": "CVE-2025-71334",
  "confidence": "Confirmed",
  "cvss_score": 9.3,
  "cvss_estimated": false,
  "epss_score": 0.0436,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 22, "sensors": 2 }
}