Unauthenticated file read via SVG auth bypass
Published May 10, 2023 · Updated Jan 27, 2025
Authentication bypass in n8n before 0.216.1 allows remote attackers to access protected REST endpoints through crafted URLs. The authentication middleware skips JWT checks whenever a request URL contains .svg, rather than limiting the exception to known static assets. No account is required; chaining the bypass with the data endpoint's path traversal exposes arbitrary server files, including SQLite data and secrets.
Summary
What happened
Authentication bypass in n8n before 0.216.1 allows remote attackers to access protected REST endpoints through crafted URLs. The authentication middleware skips JWT checks whenever a request URL contains .svg, rather than limiting the exception to known static assets. No account is required; chaining the bypass with the data endpoint's path traversal exposes arbitrary server files, including SQLite data and secrets.
The record
- CVE
- CVE-2023-27564
- Published
- May 10, 2023
- Updated
- Jan 27, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-668, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 10, 2023CVE publishedPublication date reported by the CVE source.
- Jan 27, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- Synacktiv unauthenticated file-read proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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