CVE-2026-34160— Chamilo LMS: Unauthenticated SSRF via PENS Plugin allows attacker to probe internal network and reach cloud metadata services
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之前版本存在代码问题漏洞，该漏洞源于未经验证的PENS插件端点接受用户控制的package-url参数且未过滤私有或内部IP地址，可能导致未经身份验证的服务端请求伪造攻击。
Possible ATT&CK Techniques 3 AI
T1530 · Data from Cloud Storage T1590 · Gather Victim Network Information T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-34160
Vulnerability Information
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Vulnerability Title
Chamilo LMS: Unauthenticated SSRF via PENS Plugin allows attacker to probe internal network and reach cloud metadata services
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, the PENS (Package Exchange Notification Services) plugin endpoint at public/plugin/Pens/pens.php is accessible without authentication and accepts a user-controlled package-url parameter that the server fetches using curl without filtering private or internal IP addresses, enabling unauthenticated Server-Side Request Forgery (SSRF). An attacker can exploit this to probe internal network services, access cloud metadata endpoints (such as 169.254.169.254) to steal IAM credentials and sensitive instance metadata, or trigger state-changing operations on internal services via the receipt and alerts callback parameters. No authentication is required to exploit either SSRF vector, significantly increasing the attack surface. 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:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Chamilo LMS 代码问题漏洞
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之前版本存在代码问题漏洞，该漏洞源于未经验证的PENS插件端点接受用户控制的package-url参数且未过滤私有或内部IP地址，可能导致未经身份验证的服务端请求伪造攻击。
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-RC.3 | - |
|
II. Public POCs for CVE-2026-34160
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-34160 (1)
Vendor Advisories for CVE-2026-34160 (1)
Same Patch Batch · chamilo · 2026-04-14 · 8 CVEs total
| CVE-2026-35196 | 8.8 HIGH | Chamilo LMS has OS Command Injection via export_all_certificates action |
| CVE-2026-40291 | 8.8 HIGH | Chamilo LMS has Privilege Escalation via API User Role Modification |
| 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. |
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V. Comments for CVE-2026-34160
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