CVE-2025-52478Public exploitNetwork attack vector

Account takeover via unsanitized Form Trigger HTML

Published Aug 19, 2025 · Updated Aug 19, 2025

Stored XSS in n8n 1.77.0 through 1.98.1 allows remote authenticated users to take over accounts through malicious forms. The sanitizeHtml function allowed every attribute on iframe, video, and source elements, preserving srcdoc and onerror payloads that execute in a victim's browser. Exploitation requires an authenticated attacker to create the form and an authenticated victim to visit it; stolen browser identifiers and session cookies permit account impersonation and profile changes, especially without 2FA.

CVSS severity8.7
High
EPSS probability0.38%
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 n8n 1.77.0 through 1.98.1 allows remote authenticated users to take over accounts through malicious forms. The sanitizeHtml function allowed every attribute on iframe, video, and source elements, preserving srcdoc and onerror payloads that execute in a victim's browser. Exploitation requires an authenticated attacker to create the form and an authenticated victim to visit it; stolen browser identifiers and session cookies permit account impersonation and profile changes, especially without 2FA.

The record

CVE
CVE-2025-52478
Published
Aug 19, 2025
Updated
Aug 19, 2025
Vendor
n8n
Product
n8n
Classifications
CWE-79, T1539
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.77.0, < 1.98.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=>= 1.77.0, < 1.98.2

Published CVSS scores

8.7n8nCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie

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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