CVE-2026-33698: Chamilo LMS is a learning management system

Q: How do I fix CVE-2026-33698?

chamilo lms: upgrade to 1.11.38. Exact commands for each OS are on this page.

Q: Is CVE-2026-33698 being exploited?

CVE-2026-33698 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33698 affect?

CVE-2026-33698 affects chamilo lms. Severity is critical (CVSS 9.8). 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

Q: How urgent is CVE-2026-33698?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-33698 is a critical-severity flaw (CVSS 9.8) 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 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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-552
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 UPGRADE

Affected: < 1.11.38

Fixed in: 1.11.38

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.11.38 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade chamilo-lms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chamilo-lms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-33698?

chamilo lms: upgrade to 1.11.38. Exact commands for each OS are on this page.

Is CVE-2026-33698 being exploited?

CVE-2026-33698 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-2026-33698 affect?

CVE-2026-33698 affects chamilo lms. Severity is critical (CVSS 9.8). 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

How urgent is CVE-2026-33698?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-32894 HIGH 7.1 UPGRADE Chamilo LMS is a learning management system
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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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