RCE in Chamilo Chamilo-Lms
CVE-2026-35196
Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an OS Command Injection vulnerability exists in the main/inc/ajax/gradebook.ajax.php endpoint within the export_all_certificates action, where the course code retrieved from the session variable $_SESSION['_cid'] via api_get_course_id() is concatenated directly into a shell_exec() command string without sanitization or escaping using escapeshellarg(). If an attacker can manipulate or poison their session data to inject shell metacharacters into the _cid variable, they can achieve arbitrary command execution on the underlying server. Successful exploitation grants full access to read system files and credentials, alters the application and database, or disrupts server availability. This issue has been fixed in version 2.0.0-RC.3.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.026 · change: +0.009
Affected products
- Chamilo Chamilo-Lms — versions < 2.0.0-RC.3
- Chamilo Lms — versions 2.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/chamilo/chamilo-lms/security/advisories/GHSA-crc6-r6c7-44q3 (Exploit, Vendor Advisory)
- github.com/chamilo/chamilo-lms/commit/62671e5e268f235cddfba704edee90f35c234df1 (Patch)
- github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-35196?
- CVE-2026-35196 is a high-severity vulnerability in Chamilo Chamilo-Lms, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-04-14.
- How severe is CVE-2026-35196?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2026-35196 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.