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CVE-2026-35196— Chamilo LMS has OS Command Injection via export_all_certificates action

Quick assessment

Affected
chamilo chamilo-lms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Chamilo LMS是Chamilo开源的一套开源的在线学习和协作系统。该系统支持创建教学内容、远程培训和在线答题等。 Chamilo LMS 2.0.0-RC.3之前版本存在操作系统命令注入漏洞，该漏洞源于gradebook.ajax.php端点存在OS命令注入，可能导致任意命令执行。

CVSS 8.8 · High EPSS 2.63% · P85

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-35196

Vulnerability Information
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Vulnerability Title
Chamilo LMS has OS Command Injection via export_all_certificates action
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Chamilo LMS 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Chamilo LMS是Chamilo开源的一套开源的在线学习和协作系统。该系统支持创建教学内容、远程培训和在线答题等。 Chamilo LMS 2.0.0-RC.3之前版本存在操作系统命令注入漏洞，该漏洞源于gradebook.ajax.php端点存在OS命令注入，可能导致任意命令执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
chamilo chamilo-lms < 2.0.0-RC.3 -

II. Public POCs for CVE-2026-35196

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III. Intelligence Information for CVE-2026-35196

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Patches & Fixes for CVE-2026-35196 (1)

Vendor Advisories for CVE-2026-35196 (1)

Same Patch Batch · chamilo · 2026-04-14 · 8 CVEs total

CVE-2026-40291 8.8 HIGH Chamilo LMS has Privilege Escalation via API User Role Modification
CVE-2026-34160 8.6 HIGH Chamilo LMS: Unauthenticated SSRF via PENS Plugin allows attacker to probe internal networ
CVE-2026-33715 7.2 HIGH Chamilo LMS has Unauthenticated SSRF and Open Email Relay via install.ajax.php test_mailer
CVE-2026-34602 7.1 HIGH Chamilo LMS: IDOR in /api/course_rel_users Allows Unauthorized Enrollment of Arbitrary Use
CVE-2026-34370 6.5 MEDIUM Chamilo LMS: IDOR in the Notebook Module allows an attacker to view other users' private n
CVE-2026-34161 Chamilo LMS: Stored XSS via Malicious File Upload in Social Post Attachments Leads to Arbi
CVE-2026-33714 Chamilo LMS has Authenticated SQL Injection in statistics.ajax.php users_active action (2.

IV. Related Vulnerabilities

Same product: chamilo-lms
Same vendor: chamilo
Same weakness: CWE-78

V. Comments for CVE-2026-35196

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