CVE-2026-33698Network attack vector

Unauthenticated code execution via installer global overwrite

Published Apr 10, 2026 · Updated Apr 10, 2026

PHP code injection in Chamilo LMS before 1.11.38 allows remote attackers to execute code through exposed installer scripts. The main/install/index.php handler copies arbitrary POST keys into global variables, and installer routines interpolate those values into app/config/configuration.php without escaping single quotes or backslashes. No authentication or user interaction is required, but main/install/ must remain present and readable; successful exploitation writes files with the PHP process permissions and executes injected configuration code.

CVSS severity9.3
Critical
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP code injection in Chamilo LMS before 1.11.38 allows remote attackers to execute code through exposed installer scripts. The main/install/index.php handler copies arbitrary POST keys into global variables, and installer routines interpolate those values into app/config/configuration.php without escaping single quotes or backslashes. No authentication or user interaction is required, but main/install/ must remain present and readable; successful exploitation writes files with the PHP process permissions and executes injected configuration code.

The record

CVE
CVE-2026-33698
Published
Apr 10, 2026
Updated
Apr 10, 2026
Vendor
Chamilo
Product
Chamilo LMS
Classifications
CWE-552, T1190
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Chamilo · Chamilo LMSversion=< 1.11.38

Published CVSS scores

9.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Weakness, pattern, technique

CWE-552Files or Directories Accessible to External Parties
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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