CVE-2026-33618: Chamilo LMS is a learning management system

Routine

HIGH 8.8DOWNGRADE

CVE-2026-33618 is a high-severity flaw (CVSS 8.8) affecting chamilo lms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Chamilo LMS is a learning management system. Prior to .0.0-RC.3, the PlatformConfigurationController::decodeSettingArray() method uses PHP's eval() to parse platform settings from the database. An attacker with admin access (obtainable via Advisory 1) can inject arbitrary PHP code into the settings, which is then executed when any user (including unauthenticated) requests /platform-config/list. This vulnerability is fixed in 2.0.0-RC.3.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-95
Published	2026-04-10
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: chamilo

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-10 19:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

chamilo chamilo lms DOWNGRADE

Affected: 2.0.0 alpha1 · 2.0.0 alpha2 · 2.0.0 alpha3 · 2.0.0 alpha4 · 2.0.0 alpha5 · 2.0.0 beta1 · 2.0.0 beta2 · 2.0.0 beta3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy chamilo-lms || rpm -q chamilo-lms || chamilo-lms --version

2. No fixed release: DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison chamilo-lms sudo apt install chamilo-lms=<VERSION_BEFORE_2.0.0> sudo apt-mark hold chamilo-lms

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list chamilo-lms sudo dnf downgrade chamilo-lms-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add chamilo-lms

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33618?

chamilo lms: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-33618 being exploited?

CVE-2026-33618 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33618 affect?

CVE-2026-33618 affects chamilo lms. Severity is high (CVSS 8.8). Chamilo LMS is a learning management system. Prior to .0.0-RC.3, the PlatformConfigurationController::decodeSettingArray() method uses PHP's eval() to parse platform settings from the database. An attacker with admin access (obtainable via

How urgent is CVE-2026-33618?

Priority 37/100. High severity

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-32894 HIGH 7.1 UPGRADE Chamilo LMS is a learning management system
CVE-2026-31940 HIGH 7.5 UPGRADE Chamilo LMS is a learning management system
CVE-2026-31941 HIGH 7.7 UPGRADE Chamilo LMS is a learning management system
CVE-2026-33702 HIGH 7.1 UPGRADE Chamilo LMS is a learning management system
CVE-2026-33736 MEDIUM 6.5 DOWNGRADE Chamilo LMS is a learning management system

References

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