CVE-2026-33737

Chamilo LMS has an XML External Entity (XXE) Injection

5.3 Medium

CVE-2026-33737 is a medium vulnerability (CVSS 5.3) in Chamilo Lms, published April 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 12th percentile. No source names a fixed version.

Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, multiple files use simplexml_load_string() without XXE protection. With LIBXML_NOENT flag, arbitrary server files can be read. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.22%Up 0.2 points since Apr 11, 2026

What each source reports

CVE List Score used 5.3

Chamilo LMS has an XML External Entity (XXE) Injection

Record: CVE-2026-33737
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-611
Updated: 2026-11-02

EUVDEUVD-2026-21569 5.3

Record: EUVD-2026-21569
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

NVD 5.3

Record: CVE-2026-33737
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-611
Updated: 2026-11-02

OSV 5.3