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Admin CVE-2026-5251

| EUVDEUVD-2026-17771 LOW
Improperly Controlled Modification of Dynamically-Determined Object Attributes (CWE-915)
2026-04-01 VulDB GHSA-vwp7-r9vq-p5wq
2.1
CVSS 4.0 · NVD

Severity by source

NVD PRIMARY
2.1 LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

6
Severity Changed
Apr 29, 2026 - 01:11 NVD
MEDIUM LOW
CVSS changed
Apr 29, 2026 - 01:11 NVD
5.3 (MEDIUM) 2.1 (LOW)
PoC Detected
Apr 01, 2026 - 14:23 vuln.today
Public exploit code
EUVD ID Assigned
Apr 01, 2026 - 02:45 euvd
EUVD-2026-17771
Analysis Generated
Apr 01, 2026 - 02:45 vuln.today
CVE Published
Apr 01, 2026 - 02:30 nvd
MEDIUM 5.3

DescriptionCVE.org

A vulnerability was identified in z-9527 admin 1.0/2.0. This impacts an unknown function of the file /server/routes/user.js of the component User Update Endpoint. Such manipulation of the argument isAdmin with the input 1 leads to dynamically-determined object attributes. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Privilege escalation in z-9527 admin 1.0/2.0 allows authenticated users to manipulate the isAdmin parameter in the User Update Endpoint (/server/routes/user.js) to gain administrative privileges through dynamically-determined object attributes. The vulnerability requires network access and valid credentials (PR:L per CVSS vector) but no user interaction. Publicly available exploit code exists, and the vendor has not responded to disclosure attempts, leaving all versions in the 1.x and 2.x branches unpatched.

Technical ContextAI

The vulnerability stems from CWE-915 (Improperly Controlled Modification of Dynamically-Determined Object Attributes), a class of flaw where user-supplied input directly influences object property assignment without proper validation. In this case, the /server/routes/user.js endpoint accepts an isAdmin parameter that is processed without adequate authorization checks or type validation, allowing an authenticated user to set this attribute to 1 and grant themselves admin privileges. The affected product is z-9527 admin, a Node.js-based application (per CPE cpe:2.3:a:z-9527:admin:*:*:*:*:*:*:*:*), and the flaw exists in both versions 1.0 and 2.0. This is a classic object injection vulnerability pattern common in loosely-typed JavaScript backends that assign request parameters directly to user objects.

RemediationAI

No vendor-released patch identified at time of analysis, as the vendor did not respond to early disclosure attempts. Immediate mitigation requires implementing proper authorization validation in the User Update Endpoint at /server/routes/user.js to ensure only admin users can modify the isAdmin attribute; this should include server-side role checks before processing any privilege-modification requests. Alternatively, restrict User Update Endpoint access to administrators only via authentication middleware. If upgrade is possible, verify with the vendor whether versions beyond 2.0 contain fixes (though no response history suggests this is unlikely). Organizations unable to patch should consider removing or isolating the application from multi-user environments where privilege escalation poses significant risk. The publicly available exploit at https://github.com/CC-T-454455/Vulnerabilities/tree/master/z9527-admin/vulnerability-11 should be reviewed to understand the exact attack method and inform custom patches or compensating controls.

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CVE-2026-5251 vulnerability details – vuln.today

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