Administrator account takeover via forged user.cgi requests
Published Jan 6, 2026 · Updated Jan 6, 2026
Cross-site request forgery in P5 FNIP-8x16A 1.0.11 and 1.0.20 allows attackers to create or alter administrator accounts. The user.cgi handler accepts cross-origin POST requests for usernames, roles, enablement, and passwords without validating request authenticity. Exploitation requires an authenticated administrator to load an attacker-controlled page, after which a forged request can add an administrator or reset the existing administrator password.
Summary
What happened
Cross-site request forgery in P5 FNIP-8x16A 1.0.11 and 1.0.20 allows attackers to create or alter administrator accounts. The user.cgi handler accepts cross-origin POST requests for usernames, roles, enablement, and passwords without validating request authenticity. Exploitation requires an authenticated administrator to load an attacker-controlled page, after which a forged request can add an administrator or reset the existing administrator password.
The record
- CVE
- CVE-2020-36906
- Published
- Jan 6, 2026
- Updated
- Jan 6, 2026
- Vendor
- P5
- Product
- FNIP-8x16A
- Classifications
- CWE-352, T1189, T1098
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 6, 2026CVE publishedPublication date reported by the CVE source.
- Jan 6, 2026Record 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.
- Affected versionversion=1.0.11
- Affected versionversion=1.0.20
What conditions does exploitation require?
What is affected?
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
- P5 FNIP user.cgi CSRF HTML formproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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