Vulnerability · Published Apr 8, 2026 · Assigned by VulDB

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

High 7.3

In plain English

A high-severity SQL injection in Online Course Registration from PHPGurukul. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.3%top 81.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
PHPGurukul	Online Course Registration	3.1

Weakness: CWE-89, CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-356261 | PHPGurukul Online Course Registration check_availability.php sql injection vdb-entry, technical-description
VDB-356261 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #787686 | PHPGurukul Online Course Registration 3.1 SQL Injection third-party-advisory
https://github.com/f1rstb100d/CVE/issues/20 exploit, issue-tracking
https://phpgurukul.com/ product