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Online Hotel Management System CVE-2026-13553

| EUVDEUVD-2026-40064 MEDIUM
Improper Access Control (CWE-284)
2026-06-29 cna@vuldb.com GHSA-p72c-jx3c-j3vr
Authentication Bypass File Upload PHP
5.5
CVSS 4.0 · Vendor: vuldb
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Severity by source

Vendor (vuldb) PRIMARY
5.5 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
vuln.today AI
10.0 CRITICAL

Unauthenticated network access, no complexity; PHP webshell upload yields full RCE with scope change across server resources.

3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (vuldb).

CVSS VectorVendor: vuldb

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Jun 29, 2026 - 10:33 vuln.today

DescriptionCVE.org

A flaw has been found in itsourcecode Online Hotel Management System 1.0. Affected is an unknown function of the file /admin/mod_amenities/controller.php?action=add. Executing a manipulation of the argument image can lead to unrestricted upload. It is possible to launch the attack remotely. The exploit has been published and may be used.

AnalysisAI

Unrestricted file upload in itsourcecode Online Hotel Management System 1.0 allows remote attackers to upload arbitrary files - including PHP webshells - via the image parameter of /admin/mod_amenities/controller.php?action=add. The CVSS 4.0 vector assigns PR:N (no privileges required), corroborated by the 'Authentication Bypass' tag, indicating the admin-facing endpoint is reachable without credentials. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify exposed admin endpoint
Delivery
Send unauthenticated POST with PHP webshell as image
Exploit
Server stores file without validation
Execution
Request uploaded file URL
Persist
PHP executes as web server user
Impact
Achieve remote code execution
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Vulnerability AssessmentAI

Exploitation The CVSS 4.0 vector specifies PR:N (no privileges required) and the 'Authentication Bypass' tag confirms the `/admin/mod_amenities/controller.php` endpoint is reachable without prior authentication. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 5.5 with E:P (exploit published) understates the realistic exploitability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An unauthenticated remote attacker identifies an exposed instance of Online Hotel Management System 1.0, then directly submits a multipart HTTP POST request to `/admin/mod_amenities/controller.php?action=add` with a PHP webshell disguised as an image file in the `image` parameter. Because no authentication check or file-type validation is enforced, the server stores the PHP file in a web-accessible upload directory. …
Remediation No vendor-released patch has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-13553 vulnerability details – vuln.today
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