High 7.1Published Apr 10, 2026

CVE-2026-33704Chamilo LMS Affected by Authenticated Arbitrary File Write via BigUpload endpoint

Updated under an hour ago (Oct 27, 2026, 6:50 AM ET)

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Every CVE for chamilo-lms

Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Weakness (CWE): CWE-434
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

chamilo chamilo-lms chamilo:lms (from the name)	before 1.11.38	CNA record
chamilo chamilo_lms chamilo:chamilo_lms	before 1.11.38	NVD

References

References

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-phfx-pwwg-945v	x-refsource-confirm, vendor-advisory
https://github.com/chamilo/chamilo-lms/commit/9748f1ffbdb8b6dc84c0e0591c9d3c1d92e21c00	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.