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PHP CVE-2026-5813

| EUVDEUVD-2026-20805 MEDIUM
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)
2026-04-08 cna@vuldb.com GHSA-5234-75g6-h6rq
SQLi PHP
5.5
CVSS 4.0 · NVD
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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/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

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

4
CVSS changed
Apr 29, 2026 - 01:11 NVD
6.9 (MEDIUM) 5.5 (MEDIUM)
EUVD ID Assigned
Apr 08, 2026 - 23:24 euvd
EUVD-2026-20805
Analysis Generated
Apr 08, 2026 - 23:24 vuln.today
CVE Published
Apr 08, 2026 - 23:17 nvd
MEDIUM 6.9

DescriptionCVE.org

A weakness has been identified in PHPGurukul Online Course Registration 3.1. This vulnerability affects unknown code of the file /check_availability.php. Executing a manipulation of the argument cid can lead to sql injection. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks.

AnalysisAI

SQL injection in PHPGurukul Online Course Registration 3.1 allows unauthenticated remote attackers to manipulate the cid parameter in /check_availability.php to execute arbitrary SQL queries, potentially leading to unauthorized data access or modification. Publicly available exploit code exists, elevating real-world risk despite moderate CVSS scoring.

Technical ContextAI

PHPGurukul Online Course Registration is a PHP-based educational management application. The vulnerability stems from improper input validation on the cid (course ID) parameter passed to the /check_availability.php endpoint. The application fails to sanitize or parameterize SQL query construction, allowing an attacker to inject arbitrary SQL syntax. CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component) indicates the root cause is insufficient encoding or escaping of user-supplied data before incorporation into SQL statements. The attack surface is direct HTTP/HTTPS access to the affected PHP file with no authentication required, making exploitation trivial.

RemediationAI

Apply a patched version of PHPGurukul Online Course Registration once released by the vendor. As a primary mitigation, implement parameterized queries (prepared statements) for all SQL operations, particularly in /check_availability.php. Validate and whitelist the cid parameter to accept only numeric course IDs; reject or sanitize any non-numeric input before database operations. Apply Web Application Firewall rules to detect and block SQL injection payloads in the cid parameter. Monitor for suspicious database query patterns. Consult vendor advisory at https://phpgurukul.com/ for official patch availability and deployment timeline.

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CVE-2026-5813 vulnerability details – vuln.today
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