Description
Schule is open-source school management system software. The generateOTP() function generates a 4-digit numeric One-Time Password (OTP). Prior to version 1.0.1, even if a secure random number generator is used, the short length and limited range (1000–9999) results in only 9000 possible combinations. This small keyspace makes the OTP highly vulnerable to brute-force attacks, especially in the absence of strong rate-limiting or lockout mechanisms. Version 1.0.1 fixes the issue.
Published: 2025-05-22
Score: 6.6 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-28211 Schule is open-source school management system software. The generateOTP() function generates a 4-digit numeric One-Time Password (OTP). Prior to version 1.0.1, even if a secure random number generator is used, the short length and limited range (1000–9999) results in only 9000 possible combinations. This small keyspace makes the OTP highly vulnerable to brute-force attacks, especially in the absence of strong rate-limiting or lockout mechanisms. Version 1.0.1 fixes the issue.
History

Fri, 05 Sep 2025 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Schule111
Schule111 schule School Management System
CPEs cpe:2.3:a:schule111:schule_school_management_system:1.0.0:*:*:*:*:*:*:*
Vendors & Products Schule111
Schule111 schule School Management System
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

Fri, 23 May 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 22 May 2025 20:45:00 +0000

Type Values Removed Values Added
Description Schule is open-source school management system software. The generateOTP() function generates a 4-digit numeric One-Time Password (OTP). Prior to version 1.0.1, even if a secure random number generator is used, the short length and limited range (1000–9999) results in only 9000 possible combinations. This small keyspace makes the OTP highly vulnerable to brute-force attacks, especially in the absence of strong rate-limiting or lockout mechanisms. Version 1.0.1 fixes the issue.
Title Schule Has Insecure OTP Length, is Susceptible to Brute-Force Attacks
Weaknesses CWE-521
References
Metrics cvssV4_0

{'score': 6.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U'}

Subscriptions

Schule111 Schule School Management System
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-05-23T13:56:37.894Z

Reserved: 2025-05-19T15:46:00.395Z

Link: CVE-2025-48372

cve-icon Vulnrichment

Updated: 2025-05-23T13:56:31.257Z

cve-icon NVD

Status : Analyzed

Published: 2025-05-22T21:15:36.640

Modified: 2025-09-05T14:15:28.703

Link: CVE-2025-48372

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses