CVE-2026-33708Network attack vector

Authenticated PII disclosure via missing endpoint authorization

Published Apr 10, 2026 · Updated Apr 10, 2026

Missing authorization in Chamilo LMS before 1.11.38 allows remote authenticated users to retrieve other users' personal data. The GET_USER_INFO_FROM_USERNAME branch in main/webservices/api/v2.php accepts a login name and returns the matched account's ID, name, email, username, and status without checking for platform-administrator privileges. Any authenticated account, including a student, can query usernames to harvest directory data; the flaw does not write data or interrupt service.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Chamilo LMS before 1.11.38 allows remote authenticated users to retrieve other users' personal data. The GET_USER_INFO_FROM_USERNAME branch in main/webservices/api/v2.php accepts a login name and returns the matched account's ID, name, email, username, and status without checking for platform-administrator privileges. Any authenticated account, including a student, can query usernames to harvest directory data; the flaw does not write data or interrupt service.

The record

CVE
CVE-2026-33708
Published
Apr 10, 2026
Updated
Apr 10, 2026
Vendor
Chamilo
Product
Chamilo LMS
Classifications
CWE-862, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.11.38

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chamilo · Chamilo LMSversion=< 1.11.38

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1087Account Discovery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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