Is CVE-2026-33698 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-33698, but active exploitation has not been confirmed.

Can CVE-2026-33698 be exploited remotely?

Yes. CVE-2026-33698 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-33698?

CVE-2026-33698 has a CVSS score of 9.8 (CRITICAL).

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CRITICALPOC

CVE-2026-33698

CWE-552Published: April 10, 2026· Updated: Apr 16, 2026

9.8

CVSS v3.1

Official Description

Chamilo LMS is a learning management system. Prior to 1.11.38, a chained attack can enable otherwise-blocked PHP code from the main/install/ directory and allow an unauthenticated attacker to modify existing files or create new files where allowed by system permissions. This only affects portals with the main/install/ directory still present and read-accessible. This vulnerability is fixed in 1.11.38.

NVD Source

Technical Analysis

CVE-2026-33698 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

A proof-of-concept (PoC) exploit exists for CVE-2026-33698. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.