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VulnerabilityPublished Updated

CVE-2026-33736: chamilo-lms · Insecure Direct Object Reference

Affects chamilo-lmsSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 2.0.0-RC.3 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.0.0-RC.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade chamilo-lms to 2.0.0-RC.3.

Affected software

ProductAffectedFixed in
chamilochamilo-lmsAffected
  • >=2.0.0-alpha.1 <2.0.0-RC.3
Fixed in
  • 2.0.0-RC.3
GitHubchamilo/chamilo-lmspkg:github/chamilo/chamilo-lmsOther threatsAffected
  • =2.0.0-RC.3
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade chamilo-lms to version 2.0.0-RC.3 or later, where this vulnerability is fixed. Since the vendor advisory indicates the issue is resolved starting from this version, applying this update fully mitigates the risk. Patch status is not explicitly stated beyond the fixed version; therefore, confirm with the vendor advisory before deployment.

Description

Chamilo LMS is a learning management system. Prior to 2.0.0-RC.3, any authenticated user (including ROLE_STUDENT) can enumerate all platform users and access personal information (email, phone, roles) via GET /api/users, including administrator accounts. This vulnerability is fixed in 2.0.0-RC.3.

References

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