Is CVE-2026-33737 actively exploited?

CVE-2026-33737 has no public evidence of in-the-wild exploitation as of 2026-04-16.

What is the CVSS score for CVE-2026-33737?

CVE-2026-33737 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.

How do I patch CVE-2026-33737?

Patch guidance is available from chamilo security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-33737.

CVE-2026-33737 - remediation guidance & executive summary

Q: Which products are affected by CVE-2026-33737?

11 products: chamilo chamilo lms, chamilo chamilo lms, chamilo chamilo lms, chamilo chamilo lms, chamilo chamilo lms, and 6 more.

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector: network
Complexity: high
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none
Weaknesses: CWE-611 · XML External Entity (XXE)

Metadata

Primary Vendor: CHAMILO
Published: 4/10/2026
Last Modified: 4/16/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

chamilo : chamilo_lmschamilo : chamilo_lmschamilo : chamilo_lmschamilo : chamilo_lmschamilo : chamilo_lmschamilo : chamilo_lmschamilo : chamilo_lmschamilo : chamilo_lmschamilo : chamilo_lmschamilo : chamilo_lmschamilo : chamilo_lms

Remediation Guidance

Executive Summary

View on NIST NVD