Medium severity · published Apr 10, 2026
CVE-2026-33703
Chamilo LMS Critical IDOR: Any Authenticated User Can Extract All Users’ Personal Data and API Tokens
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
Chamilo LMS is a learning management system. Prior to 2.0.0-RC.3, an Insecure Direct Object Reference (IDOR) vulnerability in the /social-network/personal-data/{userId} endpoint allows any authenticated user to access full personal data and API tokens of arbitrary users by modifying the userId parameter. This results in mass disclosure of sensitive user information and credentials, enabling a full platform data breach. This vulnerability is fixed in 2.0.0-RC.3.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
chamilo-lms · chamilo
< 2.0.0-RC.3 · source: vendor
CL
Chamilo Lms · Chamilo
2.0.0; 2.0.0; 2.0.0; 2.0.0; 2.0.0; 2.0.0; +4 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33703
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33703
Vendor Advisory
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-27x6-c5c7-gpf5
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