EUVD-2026-12492CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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Description
Chamilo LMS is a learning management system. Prior to version 1.11.34, there is an unauthenticated SQL injection vulnerability which allows remote attackers to execute arbitrary SQL commands via the custom_dates parameter. By chaining this with a predictable legacy password reset mechanism, an attacker can achieve full administrative account takeover without any prior credentials. The vulnerability also exposes the entire database, including PII and system configurations. This issue has been patched in version 1.11.34.
Analysis
Unauthenticated SQL injection in Chamilo LMS versions prior to 1.11.34 enables remote attackers to execute arbitrary database queries through the custom_dates parameter and escalate to full administrative account takeover by exploiting a predictable password reset mechanism. This critical vulnerability exposes the entire database including personally identifiable information and system configurations without requiring any credentials or user interaction. …
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Remediation
Within 24 hours: Identify all Chamilo LMS instances in your environment and document their versions; isolate affected systems from production networks if possible and restrict external access. Within 7 days: Implement emergency WAF rules to block requests containing SQL injection patterns in the custom_dates parameter; deploy network segmentation to limit lateral movement if compromise occurs; and establish enhanced monitoring for suspicious database queries. …
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