Authenticated document overwrite via unchecked object ID
Published Apr 21, 2026 · Updated Apr 21, 2026
Broken object authorization in Horilla HRMS 1.5.0 allows remote authenticated users to overwrite another employee's document. The employee document upload handler retrieves a Document solely by the numeric path ID, binds submitted files to that instance, and saves it without an ownership or object-level permission check. Any logged-in employee who knows or guesses another document ID can replace that file and tamper with the corresponding HR record.
Summary
What happened
Broken object authorization in Horilla HRMS 1.5.0 allows remote authenticated users to overwrite another employee's document. The employee document upload handler retrieves a Document solely by the numeric path ID, binds submitted files to that instance, and saves it without an ownership or object-level permission check. Any logged-in employee who knows or guesses another document ID can replace that file and tamper with the corresponding HR record.
The record
- CVE
- CVE-2026-40866
- Published
- Apr 21, 2026
- Updated
- Apr 21, 2026
- Vendor
- Cybrosys Technologies
- Product
- Horilla HRMS
- Classifications
- CWE-639, CWE-284, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 21, 2026CVE publishedPublication date reported by the CVE source.
- Apr 21, 2026Record 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=1.5.0
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
- Vendor-advisory document overwrite proof of conceptproof of concept · demonstrated
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