cbcvebase.
CVE-2026-30875
published 2026-03-16

CVE-2026-30875: 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…

PriorityP262high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
0.52%
39.9th percentile
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.

Affected

2 ranges
VendorProductVersion rangeFixed in
chamilochamilo-lms< 1.11.361.11.36
chamilochamilo_lms< 1.11.361.11.36

Detection & IOCsextracted from sources · hover to see the quote

filename.htaccess
filenameh5p.json
  • Monitor for H5P package uploads by Teacher-role users that contain .htaccess files or PHP files with alternative extensions (e.g., .txt) within the archive.
  • Alert on .htaccess files uploaded to the Chamilo H5P import directory that contain directives enabling PHP execution for non-standard extensions such as .txt.
  • Detect webshell activity originating from Chamilo's H5P content storage path, particularly requests to .txt files that return PHP-executed output.
  • ·Exploitation requires an authenticated user with the Teacher role — unauthenticated exploitation is not possible for this CVE alone.
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