What is the CVSS score of CVE-2026-34370?

CVE-2026-34370 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Is there a patch available for CVE-2026-34370?

Yes, a patch is available for CVE-2026-34370. Update the affected software to the latest version immediately.

Chamilo Lms CVE-2026-34370

EUVD-2026-22716 MEDIUM

Improper Authorization (CWE-285)

2026-04-14 security-advisories@github.com

Authentication Bypass Chamilo Lms

6.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Patch released

Apr 22, 2026 - 18:46 nvd

Patch available

Apr 16, 2026 - 05:29 EUVD

2.0.0-RC.3

Analysis Generated

Apr 14, 2026 - 22:43 vuln.today

EUVD ID Assigned

Apr 14, 2026 - 22:22 euvd

EUVD-2026-22716

Analysis Generated

Apr 14, 2026 - 22:22 vuln.today

CVE Published

Apr 14, 2026 - 22:16 nvd

MEDIUM 6.5

DescriptionGitHub Advisory

Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the notebook module contains an Insecure Direct Object Reference (IDOR) vulnerability that allows any authenticated student to read the private course notes of any other user on the platform by manipulating the notebook_id parameter in the editnote action. The application fetches the note content using only the supplied integer ID without verifying that the requesting user owns the note, and the full title and HTML body are rendered in the edit form and returned to the attacker's browser. While ownership checks exist in the write paths (updateNote() and delete_note()), they are entirely absent from the read path (get_note_information()). This issue has been fixed in version 2.0.0-RC.3.

AnalysisAI

Chamilo LMS versions prior to 2.0.0-RC.3 allow authenticated students to read private course notes of any other user via an Insecure Direct Object Reference (IDOR) vulnerability in the notebook module's editnote action. An attacker can manipulate the notebook_id parameter to bypass ownership checks in the read path (get_note_information()), exposing note titles and HTML body content despite write-path protections existing in updateNote() and delete_note(). The vulnerability requires valid student credentials but impacts confidentiality of sensitive educational materials across the platform.

Technical ContextAI

The Chamilo LMS notebook module implements asymmetric authorization controls: ownership verification exists in write operations (updateNote and delete_note functions) but is entirely absent from the read operation (get_note_information). This represents a classic IDOR pattern (CWE-285: Improper Authorization) where the application trusts user-supplied integer IDs for direct object access without enforcing access control. The editnote action fetches and renders note content (title and HTML body) directly in the edit form based solely on the provided notebook_id parameter, failing to validate the relationship between the requesting user's identity and the note owner. The vulnerability exposes a gap in access control logic where the same resource should enforce consistent authorization across all operation types (read, write, delete).

RemediationAI

Upgrade Chamilo LMS to version 2.0.0-RC.3 or later, which includes ownership verification in the get_note_information() read path. Organizations unable to upgrade immediately should restrict access to the notebook module via application-level controls or reverse proxy rules to limit access to the editnote action to authorized user groups only. Additionally, audit access logs for suspicious notebook_id parameter enumeration patterns (sequential integer IDs across different notes) to detect exploitation attempts. Detailed patch information and upgrade instructions are available at https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3 and https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-fm35-2hvw-564q.