What is the CVSS score of CVE-2026-4237?

CVE-2026-4237 has a CVSS 4.0 base score of 5.5 (Medium). CVSS vector: 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. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2026-4237?

Yes, a public proof-of-concept exploit is available for CVE-2026-4237. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-4237?

Within 24 hours: Isolate affected systems from production networks or disable the /hotel/admin/mod_reports/index.php endpoint. Implement WAF rules to block requests containing SQL injection patterns to this endpoint. Within 7 days: Conduct forensic review of access logs to detect exploitation attempts and unauthorized database access. Within 30 days: Migrate to an alternative, actively maintained hotel reservation system or contact the vendor for emergency patching.

Free Hotel Reservation System CVE-2026-4237

EUVD-2026-12423 MEDIUM

SQL Injection (CWE-89)

2026-03-16 VulDB

PHP SQLi Free Hotel Reservation System Itsourcecode

5.5

CVSS 4.0 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Craft HTTP request with malicious SQL payload
Exploit

Inject payload into Home parameter
Execution

Execute arbitrary SQL query
Impact

Extract or modify database contents

Vulnerability Assessment

Weakness	CWE CWE-89 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Parameterized queries, prepared statements MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Persistence The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	itsourcecode Free Hotel Reservation System 1.0 with /hotel/admin/mod_reports/index.php endpoint accessible and accepting unsanitized Home parameter input without SQL query parameterization.
Impact	The CVSS 3.1 score of 7.3 indicates high severity with network-based attack vector (AV:N), low complexity (AC:L), and no required privileges (PR:N) or user interaction (UI:N), making this easily exploitable by remote attackers. The existence of a public proof-of-concept (E:P) on GitHub significantly elevates the real-world risk, as script kiddies can readily weaponize it. While EPSS data is not provided and the vulnerability is not in CISA's KEV catalog, the combination of public exploit availability, zero authentication requirements, and the typically internet-facing nature of hotel reservation systems creates a high-priority patching scenario for any organization using this software.
Exploit ScenarioDerived	An attacker can remotely send a crafted HTTP request to /hotel/admin/mod_reports/index.php with a malicious SQL payload in the 'Home' parameter, requiring no authentication or user interaction. The publicly available proof-of-concept at https://github.com/yuji0903/silver-guide/issues/14 demonstrates the exact attack methodology, allowing even low-skilled attackers to extract sensitive guest information, payment details, or modify reservation data. Given the low attack complexity and network accessibility typical of hotel systems, exploitation could occur within minutes of discovery by automated scanning tools.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 16, 2026

SQL injection in Free Hotel Reservation System 1.0 allows unauthenticated remote attackers to manipulate the Home parameter in /hotel/admin/mod_reports/index.php and execute arbitrary database queries. Public exploit code exists for this vulnerability, and no patch is currently available. Affected systems running the vulnerable PHP application are at immediate risk of data theft and database compromise.

Earlier versions of this analysis (1)

v1 Mar 16, 2026 - 13:00 CVSS 7.3

A SQL injection vulnerability exists in itsourcecode Free Hotel Reservation System version 1.0, allowing remote unauthenticated attackers to compromise the database through a malicious 'Home' parameter in the admin reports module. The vulnerability has a publicly available proof-of-concept exploit and carries a CVSS score of 7.3, enabling attackers to potentially read sensitive data, modify database contents, or disrupt service availability. While not currently listed in CISA's Known Exploited Vulnerabilities catalog, the existence of public exploit code significantly increases the immediate risk to deployed instances.

RemediationAI

No patch is currently available according to the vulnerability data, leaving organizations with limited options for direct remediation. As an immediate mitigation, administrators should implement a Web Application Firewall (WAF) with SQL injection prevention rules, particularly monitoring the /hotel/admin/mod_reports/index.php endpoint and the 'Home' parameter. Additionally, apply principle of least privilege to the database user account used by the application, restrict network access to the admin interface through IP allowlisting, and consider temporarily disabling the reports module if not business-critical until a vendor patch becomes available.

Affected VersionsENISA

Free Hotel Reservation System 1.0

Affected Packages

euvd free_hotel_reservation_system no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The vulnerability affects the PHP-based Free Hotel Reservation System developed by itsourcecode, specifically in the file /hotel/admin/mod_reports/index.php. As classified by CWE-89 (SQL Injection), this flaw occurs when user-supplied input is improperly sanitized before being used in SQL queries, allowing attackers to inject arbitrary SQL commands. The affected product is identified by CPE string cpe:2.3:a:itsourcecode:free_hotel_reservation_system:*:*:*:*:*:*:*:*, confirming version 1.0 as vulnerable according to ENISA EUVD ID EUVD-2026-12423.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD 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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

Low

Vulnerable system: Integrity

Low

Vulnerable system: Availability

Low

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

6.9 (MEDIUM) 5.5 (MEDIUM)

Severity Changed

Apr 22, 2026 - 21:37 NVD

HIGH MEDIUM

CVSS changed

Apr 22, 2026 - 21:37 NVD

7.3 (HIGH) 6.9 (MEDIUM)

PoC Detected

Mar 16, 2026 - 14:53 vuln.today

Public exploit code

CVE Published

Mar 16, 2026 - 12:02 nvd

HIGH 7.3

DescriptionCVE.org

A flaw has been found in itsourcecode Free Hotel Reservation System 1.0. This vulnerability affects unknown code of the file /hotel/admin/mod_reports/index.php. Executing a manipulation of the argument Home can lead to sql injection. The attack may be performed from remote. The exploit has been published and may be used.

Executive ViewAI

Why It Matters

A critical SQL injection vulnerability exists in the Free Hotel Reservation System 1.0 admin module with no vendor patch currently available. Active exploits are publicly available, creating immediate risk of unauthorized database access, data theft, and system compromise for any organization using this software.

Business Impact: Severe

Compensating Controls

Deploy Web Application Firewall (WAF) rules to block SQL injection payloads targeting /hotel/admin/mod_reports/index.php; restrict admin module access via network segmentation to trusted IP ranges only; disable the vulnerable reports module if not business-critical; implement database activity monitoring (DAM) to detect unauthorized queries; enforce principle of least privilege on database service accounts.

Threat Intelligence Overview

EPSS Score

0.0%

Top 92% exploitable

Exploit

POC

Public exploit code exists

Data Quality

6 sources

Confidence: High

EUVD

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.