CVE-2025-48372
Schule Has Insecure OTP Length, is Susceptible to Brute-Force Attacks
Severity Score
6.6
*CVSS v4
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Attend
*SSVC
Descriptions
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.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
System
Vulnerable | Subsequent
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Attend
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2025-05-19 CVE Reserved
- 2025-05-22 CVE Published
- 2025-05-23 CVE Updated
- 2025-05-28 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-521: Weak Password Requirements
CAPEC
References (2)
| URL | Tag | Source |
|---|---|---|
| https://github.com/schule111/Schule/commit/cd53abbea93943f2c60a5281d45bebadc57636b7 | X_refsource_misc | |
| https://github.com/schule111/Schule/security/advisories/GHSA-6c48-67xx-vqgc | X_refsource_confirm |
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