Is CVE-2026-100313 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-100313 being exploited in the wild.

How severe is CVE-2026-100313?

Medium severity, with a CVSS score of 4.3, published 26 September 2026.

Which products and versions are affected?

Mathurvishal CloudClassroom PHP Project up to commit 5dadec098bfbbf3300d60c3494db3fb95b66e7be.

Is there a fix for CVE-2026-100313?

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-2026-100313 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-100313?

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.

CVE-2026-100313: CloudClassroom-PHP-Project stored cross-site scripting in updatequery.php

CVE-2026-100313 · Severity: medium · CVSS 4.3 · Published 2026-09-26

A PHP-based classroom management application contains a stored cross-site scripting (XSS) vulnerability in its query handling code. An attacker can inject malicious scripts through the queryx parameter that execute in other users' browsers, potentially allowing session hijacking, credential theft, or defacement of the application. The vulnerability can be exploited remotely and a working exploit has been publicly disclosed.

Technologies: Mathurvishal CloudClassroom PHP Project. Vendors: Mathurvishal.

Quick answers

Is CVE-2026-100313 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-100313 being exploited in the wild.
How severe is CVE-2026-100313?: Medium severity, with a CVSS score of 4.3, published 26 September 2026.
Which products and versions are affected?: Mathurvishal CloudClassroom PHP Project up to commit 5dadec098bfbbf3300d60c3494db3fb95b66e7be.
Is there a fix for CVE-2026-100313?: 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-2026-100313 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-100313?: 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

Stored XSS vulnerability in updatequery.php allows manipulation of the queryx parameter to inject unsanitized input reflected to other users. The attack requires network access to the web application and successful execution depends on the victim viewing a page containing the injected payload. An attacker gains the ability to execute arbitrary JavaScript in the context of other users' sessions.

Affected products

mathurvishal CloudClassroom-PHP-Project up to commit 5dadec098bfbbf3300d60c3494db3fb95b66e7be

Timeline

2026-09-26: disclosed

References

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