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Chamilo LmsApplication · Chamilo

CVE-2026-30875

HIGH · 8.8 CVSS v3.1 Published 2026-03-16
Fix available
A fix is available. Upgrade to 1.11.36 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Chamilo LMS is a learning management system. Prior to version 1.11.36, an arbitrary file upload vulnerability in the H5P Import feature allows authenticated users with Teacher role to achieve Remote Code Execution (RCE). The H5P package validation only checks if h5p.json exists but doesn't block .htaccess or PHP files with alternative extensions. An attacker uploads a crafted H5P package containing a webshell and .htaccess that enables PHP execution for .txt files, bypassing security control. This issue has been patched in version 1.11.36.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Chamilo LMS versions before 1.11.36 contain an arbitrary file upload vulnerability in the H5P Import feature. The H5P package validation only checks for the presence of h5p.json but fails to block malicious files like .htaccess or PHP files with alternative extensions. An authenticated Teacher can upload a crafted H5P package containing a webshell and an .htaccess file that enables PHP execution for .txt files, achieving Remote Code Execution.

MitigationUpgrade Chamilo LMS to version 1.11.36 or later to apply the security patch. If immediate upgrading is not feasible, temporarily disable the H5P Import feature or restrict Teacher role permissions until the patch can be deployed.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Chamilo LmsApplication
Affected:< 1.11.36

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the installed Chamilo LMS version
    Check the version.php file in the Chamilo root directory or the admin panel for the exact version number
    Affected if The installed version is lower than 1.11.36
  2. Verify H5P Import feature is enabled
    Check the system configuration or plugin settings for H5P integration status in the Chamilo admin panel
    Affected if H5P Import feature is active and accessible to Teachers
  3. Confirm Teacher role permissions exist
    Review user role assignments to determine if any accounts have Teacher-level access that can access the H5P Import functionality
    Affected if There are users with Teacher role privileges in the system
  4. Inspect H5P upload directories for suspicious files
    Examine the H5P upload directories for unexpected .htaccess files or PHP files with unusual extensions, particularly files that enable PHP execution for non-standard extensions
    Affected if Unexpected .htaccess or PHP files are found in H5P-related upload directories

A system is affected if it runs Chamilo LMS version below 1.11.36 with the H5P Import feature enabled and has users with Teacher role permissions who can upload H5P packages.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 1.11.36 or later
Fixed in 1.11.36
Interim mitigation

Upgrade Chamilo LMS to version 1.11.36 or later to apply the security patch. If immediate upgrading is not feasible, temporarily disable the H5P Import feature or restrict Teacher role permissions until the patch can be deployed.

Recommended fix High confidence

1.11.36

  1. 1. Back up your existing Chamilo LMS database and files before proceeding with the upgrade.
  2. 2. Download Chamilo LMS version 1.11.36 from the official source (https://chamilo.org).
  3. 3. Replace the existing Chamilo installation files with the new version 1.11.36 files, preserving your configuration and customizations.
  4. 4. Run the database upgrade script if provided with the new version.
  5. 5. Clear any cached data and verify the H5P Import functionality is working correctly.
  6. 6. Test that the application functions normally after the upgrade.
  7. 7. Verify that the vulnerability is fixed by attempting to upload a test H5P package with disallowed file types (the system should now reject .htaccess and PHP files).
Caveat Standard upgrade considerations apply - backup before upgrade, verify custom plugins/themes compatibility, and test thoroughly in staging first

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Chamilo Lms Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,280
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-30875 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data