# CVE-2026-5814: PHPGurukul Online Course Registration SQL injection in check_availability.php

Source: https://junglewise.ai/threats/cve-2026-5814-phpgurukul-online-course-registration-sql-injection-in-check  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-09. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-5814 · Severity: high · CVSS 7.3 · Published 2026-04-09

PHPGurukul Online Course Registration is a web application used to manage student enrollments and course data. A security flaw allows remote attackers to interfere with the application's database without needing a username or password. This could lead to the theft of sensitive student information, unauthorized modification of records, or disruption of the registration service.

Technologies: [Phpgurukul Online Course Registration](https://junglewise.ai/threats/technologies/online-course-registration). Vendors: [Phpgurukul](https://junglewise.ai/threats/vendors/phpgurukul).

## Quick answers

**Is CVE-2026-5814 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-5814 being exploited in the wild.

**How severe is CVE-2026-5814?** High severity, with a CVSS score of 7.3, published 9 April 2026.

**Which products and versions are affected?** Phpgurukul Online Course Registration 3.1.

**Is there a fix for CVE-2026-5814?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-5814 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-5814?** Check whether you run Phpgurukul Online Course Registration at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A SQL injection vulnerability exists in PHPGurukul Online Course Registration 3.1 within the '/admin/check_availability.php' file. The root cause is the failure to sanitize or validate the 'regno' POST parameter before using it in a database query. An unauthenticated remote attacker can exploit this using boolean-based or time-based blind SQL injection techniques. Successful exploitation allows for unauthorized database access, potentially leading to data exfiltration, modification, or full system compromise. A public exploit (PoC) has been disclosed, and no official patch is currently documented in the advisory.

## Affected products

- PHPGurukul Online Course Registration 3.1

## Timeline

- 2026-03-25: disclosed: Public issue opened on GitHub with PoC details
- 2026-04-09: advisory: NVD publication date

## References

- [https://github.com/f1rstb100d/CVE/issues/21](https://github.com/f1rstb100d/CVE/issues/21)
- [https://phpgurukul.com/](https://phpgurukul.com/)
- [https://vuldb.com/submit/787698](https://vuldb.com/submit/787698)
- [https://vuldb.com/vuln/356262](https://vuldb.com/vuln/356262)
- [https://vuldb.com/vuln/356262/cti](https://vuldb.com/vuln/356262/cti)

## Related threats

- [PHPGurukul Online Course Registration SQL injection in check_availability.php](https://junglewise.ai/threats/cve-2026-5813-phpgurukul-online-course-registration-sql-injection-in-check)
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