CVE-2026-33715Network attack vector

Unauthenticated SSRF and email relay via mailer DSN

Published Apr 14, 2026 · Updated Apr 14, 2026

SSRF in Chamilo LMS 2.0-RC.2 allows remote attackers to reach internal SMTP services and relay email through the server. The unauthenticated public/main/inc/ajax/install.ajax.php test_mailer action omits global.inc.php checks and passes a POST-supplied Symfony Mailer DSN to a new SMTP connection. A fully installed instance remains exposed without login, enabling internal network reconnaissance, attacker-directed email, and error-based disclosure of topology and services.

CVSS severity7.2
High
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

SSRF in Chamilo LMS 2.0-RC.2 allows remote attackers to reach internal SMTP services and relay email through the server. The unauthenticated public/main/inc/ajax/install.ajax.php test_mailer action omits global.inc.php checks and passes a POST-supplied Symfony Mailer DSN to a new SMTP connection. A fully installed instance remains exposed without login, enabling internal network reconnaissance, attacker-directed email, and error-based disclosure of topology and services.

The record

CVE
CVE-2026-33715
Published
Apr 14, 2026
Updated
Apr 14, 2026
Vendor
Chamilo
Product
Chamilo LMS
Classifications
CWE-306, CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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=>= 2.0-RC.2, < 2.0-RC.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Chamilo · Chamilo LMSversion=>= 2.0-RC.2, < 2.0-RC.3

Published CVSS scores

7.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/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.

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-306Missing Authentication for Critical Function
CWE-918Server-Side Request Forgery (SSRF)
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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