Auth bypass in Mathurvishal Cloudclassroom-Php-Project
CVE-2026-100876
A vulnerability was found in mathurvishal CloudClassroom-PHP-Project up to 5dadec098bfbbf3300d60c3494db3fb95b66e7be. Affected is an unknown function of the file loginlinkstudent.php. Performing a manipulation of the argument umail results in missing authentication. Remote exploitation of the attack is possible. The exploit has been made public and could be used. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Broken Authentication
Published .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
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/410806 (technical-description, vdb-entry)
- vuldb.com/vuln/410806/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-100876 (third-party-advisory)
- vuldb.com/submit/915442 (third-party-advisory)
- github.com/rmsbpro/Advisory/blob/main/broken-role-segregation.md (exploit)
Frequently asked questions
- What is CVE-2026-100876?
- CVE-2026-100876 is a medium-severity vulnerability in Mathurvishal Cloudclassroom-Php-Project, classified under Improper Authentication. CVSS score: 6.3/10. Published 2026-09-27.
- How severe is CVE-2026-100876?
- Medium severity. CVSS v3 base score is 6.3 out of 10.