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CVE-2026-100877

mathurvishal CloudClassroom-PHP-Project registrationform.php cross site scripting

MEDIUM
4.3
CVSS Score
Published: September 27, 2026 at 08:15 PM UTC
Updated: September 28, 2026 at 03:16 PM UTC
1 product affected across 1 vendorCloudClassroom-PHP-Project

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.3%
SSVC
PoC

Description

A vulnerability was determined in mathurvishal CloudClassroom-PHP-Project up to 5dadec098bfbbf3300d60c3494db3fb95b66e7be. Affected by this vulnerability is an unknown functionality of the file registrationform.php. Executing a manipulation of the argument FName/LName/Addrs can lead to cross site scripting. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. The vendor was contacted early about this disclosure but did not respond in any way.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

CloudClassroom-PHP-Project· Mathurvishal
60%
5dadec098bfbbf3300d60c3494db3fb95b66e7be

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/410807
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/410807/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-100877
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/915444
Exploit
Source: cverecord
https://github.com/rmsbpro/Advisory/blob/main/registrationform-stored-xss.md

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79CWE-94

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