CVE-2026-33704 — Chamilo LMS Affected by Authenticated Arbitrary File Write via BigUpload endpoint
Chamilo LMS is a learning management system. Prior to 1.11.38, any authenticated user (including students) can write arbitrary content to files on the server via the BigUpload e…
Published: 2026-04-10 · CVSS: 7.1 · CVSS 3.1
Chamilo LMS is a learning management system. Prior to 1.11.38, any authenticated user (including students) can write arbitrary content to files on the server via the BigUpload endpoint. The key parameter controls the filename and the raw POST body becomes the file content. While .php extensions are filtered to .phps, the .pht extension passes through unmodified. On Apache configurations where .pht is handled as PHP, this leads to Remote Code Execution. This vulnerability is fixed in 1.11.38.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7