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CVE-2026-5813— PHPGurukul Online Course Registration check_availability.php sql injection

Quick assessment

Affected
PHPGurukul Online Course Registration
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PHPGurukul Online Course Registration是PHPGurukul公司的一个在线课程注册系统。 PHPGurukul Online Course Registration 3.1版本存在SQL注入漏洞，该漏洞源于对文件/check_availability.php中参数cid的错误操作，可能导致SQL注入攻击。

CVSS 7.3 · High EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-5813

Vulnerability Information
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Vulnerability Title
PHPGurukul Online Course Registration check_availability.php sql injection
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
PHPGurukul Online Course Registration SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PHPGurukul Online Course Registration是PHPGurukul公司的一个在线课程注册系统。 PHPGurukul Online Course Registration 3.1版本存在SQL注入漏洞，该漏洞源于对文件/check_availability.php中参数cid的错误操作，可能导致SQL注入攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
PHPGurukul Online Course Registration 3.1 cpe:2.3:a:phpgurukul:online_course_registration:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5813

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11193 chars
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III. Intelligence Information for CVE-2026-5813

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Vendor Advisories for CVE-2026-5813 (1)

Proof of Concept for CVE-2026-5813 (1)

Security Blog Posts for CVE-2026-5813 (1)

IV. Related Vulnerabilities

Same product: Online Course Registration
Same vendor: PHPGurukul
Same weakness: CWE-89

V. Comments for CVE-2026-5813

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