# CVE-2026-100312: CloudClassroom PHP Project SQL injection in guest update

Source: https://junglewise.ai/threats/cve-2026-100312-a-security-flaw-has-been-discovered-in-mathurvishal  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-26. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-100312 · Severity: medium · CVSS 6.3 · Published 2026-09-26

CloudClassroom PHP is a web application for managing classroom activities. An authenticated attacker can inject malicious SQL commands through the guest name update feature, allowing them to extract sensitive database information including credentials and compromise data confidentiality and integrity. The vulnerability requires an attacker to be logged in but does not require user interaction or additional privileges.

Technologies: [Mathurvishal CloudClassroom PHP Project](https://junglewise.ai/threats/technologies/mathurvishal-cloudclassroom-php-project). Vendors: [Mathurvishal](https://junglewise.ai/threats/vendors/mathurvishal).

## Quick answers

**Is CVE-2026-100312 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-100312 being exploited in the wild.

**How severe is CVE-2026-100312?** Medium severity, with a CVSS score of 6.3, published 26 September 2026.

**Which products and versions are affected?** Mathurvishal CloudClassroom PHP Project 1.0 and prior (rolling release).

**Is there a fix for CVE-2026-100312?** 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-2026-100312 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-100312?** Check whether you run Mathurvishal CloudClassroom PHP Project 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

The vulnerability is a SQL injection flaw in the /updateguest.php endpoint that fails to sanitize the gname parameter, instead concatenating user input directly into SQL queries without prepared statements. An authenticated attacker can exploit this via POST request to extract database metadata, enumerate tables and columns, dump data, and retrieve admin credentials. No official patch is currently available from the vendor.

## Affected products

- mathurvishal CloudClassroom PHP Project 1.0 and prior (rolling release)

## Timeline

- 2026-08-03: disclosed
- 2026-09-26: advisory

## References

- [https://github.com/JaconiasDev/Advisory-CloundClassroom-PHP-Project-1.0](https://github.com/JaconiasDev/Advisory-CloundClassroom-PHP-Project-1.0)
- [https://vuldb.com/cve/CVE-2026-100312](https://vuldb.com/cve/CVE-2026-100312)

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