CVE-2026-34239Network attack vector

Authenticated code execution via missing administrator check

Published Jul 20, 2026 · Updated Jul 20, 2026

Improper authorization in Chamilo LMS 1.11.40 and earlier allows remote authenticated users to execute code through lang.ajax.php. The translate_portfolio_category action relies only on api_protect_course_script(true), admitting course-enrolled accounts without an administrator check. Any student, teacher, or DRH account enrolled in a course can reach the endpoint; the downstream unsafe operation that turns access into code execution is not disclosed.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Chamilo LMS 1.11.40 and earlier allows remote authenticated users to execute code through lang.ajax.php. The translate_portfolio_category action relies only on api_protect_course_script(true), admitting course-enrolled accounts without an administrator check. Any student, teacher, or DRH account enrolled in a course can reach the endpoint; the downstream unsafe operation that turns access into code execution is not disclosed.

The record

CVE
CVE-2026-34239
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
Chamilo
Product
Chamilo LMS
Classifications
CWE-285, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 20, 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=<= 1.11.40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chamilo · Chamilo LMSversion=<= 1.11.40

Published CVSS scores

7.5GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1190Exploit Public-Facing Application

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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