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    CVE-2026-33715

    Chamilo LMS is an open-source learning management system. In version 2.0-RC.2, the file public/main/inc/ajax/install.ajax.php is accessible without authentication on fully installed instances because, unlike other AJAX endpoints, it does not include the global.inc.php file that performs authentication and installation-completed checks. Its test_mailer action accepts an arbitrary Symfony Mailer DSN string from POST data and uses it to connect to an attacker-specified SMTP server, enabling Server-Side Request Forgery (SSRF) into internal networks via the SMTP protocol. An unauthenticated attacker can also abuse this to weaponize the Chamilo server as an open email relay for phishing and spam campaigns, with emails appearing to originate from the server's IP address. Additionally, error responses from failed SMTP connections may disclose information about internal network topology and running services. This issue has been fixed in version 2.0.0-RC.3.

    Published:Apr 14, 2026
    Last Modified:Apr 23, 2026
    EPS:Apr 14, 2026
    EPSS Score:0.00068
    CVSS Score:7.2

    Affected Products

    Vendor
    Chamilo
    Product
    Chamilo Lms

    Exploits

    https://github.com/romain-deperne/CVE-2026-33715

    Related CVEs

    CVE-2026-34239 (CVSS 7.5) — Chamilo version 1.11.40 and earlier are vulnerable to authenticated remote code execution in the main/inc/ajax…
    CVE-2026-39878 (CVSS 9.3) — Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user regis…
    CVE-2026-40291 (CVSS 8.8) — Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an insecure direct …
    CVE-2026-35196 (CVSS 8.8) — Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an OS Command Injec…
    CVE-2026-34602 (CVSS 7.1) — Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the /api/course_rel…
    CVE-2026-34370 (CVSS 6.5) — Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the notebook module…
    CVE-2026-34161 (CVSS 5.1) — Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, a Stored Cross-Site…
    CVE-2026-34160 (CVSS 8.6) — Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the PENS (Package E…
    CVE-2026-33714 (CVSS 7.1) — Chamilo is an open-source learning management system (LMS). Version 2.0.0-RC.2 contains a SQL Injection vulner…
    CVE-2026-33737 (CVSS 5.3) — Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, multiple files use simplexml_loa…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High