CVE-2025-11353 – This vulnerability allows remote attackers to u... (How to Fix)

Q: What is the severity of CVE-2025-11353?

CVE-2025-11353 has a CVSS score of 6.3 (MEDIUM). This vulnerability allows remote attackers to upload arbitrary files to the Online Hotel Reservation System 1.0 via the /admin/addgalleryexec.php endpoint. Attackers can potentially execute malicious code on the server or compromise system integrity. All users running the vulnerable version of this hotel reservation software are affected.

📋 TL;DR

This vulnerability allows remote attackers to upload arbitrary files to the Online Hotel Reservation System 1.0 via the /admin/addgalleryexec.php endpoint. Attackers can potentially execute malicious code on the server or compromise system integrity. All users running the vulnerable version of this hotel reservation software are affected.

💻 Affected Systems

Products:

code-projects Online Hotel Reservation System

Versions: 1.0

Operating Systems: All

Default Config Vulnerable: ⚠️ Yes

Notes: The vulnerability exists in the default installation with the /admin/addgalleryexec.php file

📦 What is this software?

Online Hotel Reservation System by Fabian

View all CVEs affecting Online Hotel Reservation System →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise, data theft, and server takeover

🟠

Likely Case

Malicious file upload enabling web shell deployment, data manipulation, or denial of service

🟢

If Mitigated

Limited impact with proper file upload restrictions and input validation in place

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ✅ No

Complexity: LOW

Exploit requires admin access to reach the vulnerable endpoint, but the upload mechanism itself has no restrictions

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Unknown

Vendor Advisory: https://code-projects.org/

Restart Required: No

Instructions:

No official patch available. Consider implementing workarounds or replacing the software.

🔧 Temporary Workarounds

Restrict file uploads

all

Implement strict file type validation and size limits for uploads

Remove vulnerable file

linux

Delete or rename /admin/addgalleryexec.php if not needed

rm /path/to/admin/addgalleryexec.php

🧯 If You Can't Patch

Implement web application firewall rules to block malicious upload patterns
Restrict access to admin panel to trusted IP addresses only

🔍 How to Verify

Check if Vulnerable:

Check if /admin/addgalleryexec.php exists and allows unrestricted file uploads

Check Version:

Check software version in admin panel or configuration files

Verify Fix Applied:

Test file upload functionality with various file types to ensure restrictions are in place

📡 Detection & Monitoring

Log Indicators:

Unusual file uploads to /admin/addgalleryexec.php
Suspicious file types being uploaded

Network Indicators:

POST requests to /admin/addgalleryexec.php with file uploads

SIEM Query:

source="web_logs" AND uri="/admin/addgalleryexec.php" AND method="POST" AND file_upload="true"

📊 Metadata

CVE ID: CVE-2025-11353

CVSS v3 Score: 6.3 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CWE: CWE-284

EPSS Score: 0.06% exploit probability (18.6th percentile)

Published: October 7, 2025

Last Updated: October 9, 2025

🔗 References

https://code-projects.org/ Product
https://github.com/zhicat/C/issues/30 Exploit,Issue Tracking
https://vuldb.com/?ctiid.327238 Permissions Required,VDB Entry
https://vuldb.com/?id.327238 Third Party Advisory,VDB Entry
https://vuldb.com/?submit.664920 Third Party Advisory,VDB Entry

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