Persistent arbitrary file upload via unvalidated attachments
Published Oct 6, 2025 · Updated Oct 6, 2025
Unrestricted file upload in Flowise 3.0.7 allows remote authenticated users to persist arbitrary files through the attachment API. createFileAttachment passes the supplied MIME type, contents, and original name to addArrayFilesToStorage, which writes the file without validating its extension, MIME type, or content. Low-privileged access is required, and an uploaded Node.js web shell does not execute automatically but can enable command execution if an administrator triggers it or another flaw is chained.
Summary
What happened
Unrestricted file upload in Flowise 3.0.7 allows remote authenticated users to persist arbitrary files through the attachment API. createFileAttachment passes the supplied MIME type, contents, and original name to addArrayFilesToStorage, which writes the file without validating its extension, MIME type, or content. Low-privileged access is required, and an uploaded Node.js web shell does not execute automatically but can enable command execution if an administrator triggers it or another flaw is chained.
The record
- CVE
- CVE-2025-61687
- Published
- Oct 6, 2025
- Updated
- Oct 6, 2025
- Vendor
- FlowiseAI
- Product
- Flowise
- Classifications
- CWE-434, T1105
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 6, 2025CVE publishedPublication date reported by the CVE source.
- Oct 6, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion== 3.0.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Node.js web-shell attachment upload proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo