CVE-2026-34160Public exploitNetwork attack vector

Unauthenticated SSRF via unrestricted PENS URLs

Published Apr 14, 2026 · Updated Apr 14, 2026

SSRF in the PENS plugin in Chamilo LMS before 2.0-RC.3 allows remote attackers to reach internal services via crafted URLs. The unauthenticated pens.php endpoint passes package-url, receipt, and alerts values to PensProcessor routines that accept any HTTP(S) host without rejecting private, loopback, or link-local addresses. No account or user interaction is required; the server can probe internal services, retrieve cloud instance metadata, or send state-changing callback requests.

CVSS severity8.6
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in the PENS plugin in Chamilo LMS before 2.0-RC.3 allows remote attackers to reach internal services via crafted URLs. The unauthenticated pens.php endpoint passes package-url, receipt, and alerts values to PensProcessor routines that accept any HTTP(S) host without rejecting private, loopback, or link-local addresses. No account or user interaction is required; the server can probe internal services, retrieve cloud instance metadata, or send state-changing callback requests.

The record

CVE
CVE-2026-34160
Published
Apr 14, 2026
Updated
Apr 14, 2026
Vendor
Chamilo
Product
Chamilo LMS
Classifications
CWE-918, CWE-306, CAPEC-664, T1552.005, T1046
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.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Chamilo · Chamilo LMSversion=< 2.0-RC.3

Published CVSS scores

8.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-306Missing Authentication for Critical Function
CAPEC-664Server Side Request Forgery
T1552.005Unsecured Credentials: Cloud Instance Metadata API
T1046Network Service Discovery

Public exploit references

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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