Is CVE-2026-33737 in the CISA KEV catalog?

No. CVE-2026-33737 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-33737?

CVE-2026-33737 has a CVSS v3 base score of 5.3 (MEDIUM).

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

CVE-2026-33737 has an EPSS score of 0.22% (12th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-33737?

Upgrade chamilo lms to 1.11.38 or later.

CVE & CISA-KEV Catalog

CVE-2026-33737

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-611XML External Entity (XXE)

How to fix

Remediation Available

chamilo lmsNVD

Affected:< 1.11.38Fixed in:1.11.38CVE-2026-33737derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.22%probability of exploitation in 30 days

12thpercentile

Low risk: more likely to be exploited than 12% of all known CVEs.

References

Patch2

Vendor Advisory1

github.com

Embed a live status badge for CVE-2026-33737

Markdown

[![CVE-2026-33737](https://tridentstack.com/cve/badge/CVE-2026-33737.svg)](https://tridentstack.com/cve/CVE-2026-33737)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-33737"><img src="https://tridentstack.com/cve/badge/CVE-2026-33737.svg" alt="CVE-2026-33737"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.