RCE in Mathurvishal Cloudclassroom-Php-Project
CVE-2026-100313
A weakness has been identified in mathurvishal CloudClassroom-PHP-Project up to 5dadec098bfbbf3300d60c3494db3fb95b66e7be. This affects an unknown function of the file updatequery.php. Executing a manipulation of the argument queryx can lead to cross site scripting. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Mathurvishal Cloudclassroom-Php-Project — versions 5dadec098bfbbf3300d60c3494db3fb95b66e7be
Weakness classification (CWE)
References
- vuldb.com/vuln/410441 (technical-description, vdb-entry)
- vuldb.com/vuln/410441/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-100313 (third-party-advisory)
- vuldb.com/submit/914577 (third-party-advisory)
- github.com/vinniboy021-blip/Advisory/blob/main/updatequery-stored-xss.md (exploit, patch, broken-link)
Frequently asked questions
- What is CVE-2026-100313?
- CVE-2026-100313 is a medium-severity vulnerability in Mathurvishal Cloudclassroom-Php-Project, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2026-09-26.
- How severe is CVE-2026-100313?
- Medium severity. CVSS v3 base score is 4.3 out of 10.