CVE-2025-56265Public exploitNetwork attack vector

Account compromise via unrestricted HTML file upload

Published Sep 8, 2025 · Updated Sep 8, 2025

Stored XSS in the Chat Trigger component of n8n 1.95.3, 1.100.1, and 1.101.1 allows remote authenticated users to compromise accounts. Chat Trigger accepts HTML uploads without restricting file type or validating active content, then serves them in the application's browser context. Exploitation requires another user to open or preview the uploaded file; script execution can steal session tokens or act with that user's privileges.

CVSS severity8.8
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the Chat Trigger component of n8n 1.95.3, 1.100.1, and 1.101.1 allows remote authenticated users to compromise accounts. Chat Trigger accepts HTML uploads without restricting file type or validating active content, then serves them in the application's browser context. Exploitation requires another user to open or preview the uploaded file; script execution can steal session tokens or act with that user's privileges.

The record

CVE
CVE-2025-56265
Published
Sep 8, 2025
Updated
Sep 8, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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