CVE-2026-31941Network attack vector

Internal service access via unchecked Social Wall URL

Published Apr 10, 2026 · Updated Apr 10, 2026

SSRF in Chamilo LMS before 1.11.38 and 2.0.0-alpha.1 through 2.0.0-RC.2 allows remote authenticated users to reach internal services. The read_url_with_open_graph endpoint passes the social_wall_new_msg_main POST URL to Guzzle and cURL without rejecting internal addresses or unsafe schemes. Any authenticated role, including a student, can make the server scan ports, read reachable internal content, or query cloud instance metadata.

CVSS severity7.7
High
EPSS probability0.23%
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 before 1.11.38 and 2.0.0-alpha.1 through 2.0.0-RC.2 allows remote authenticated users to reach internal services. The read_url_with_open_graph endpoint passes the social_wall_new_msg_main POST URL to Guzzle and cURL without rejecting internal addresses or unsafe schemes. Any authenticated role, including a student, can make the server scan ports, read reachable internal content, or query cloud instance metadata.

The record

CVE
CVE-2026-31941
Published
Apr 10, 2026
Updated
Apr 10, 2026
Vendor
Chamilo
Product
Chamilo LMS
Classifications
CWE-918, T1046, T1552.005
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
  2. Affected versionversion=>= 2.0.0-alpha.1, < 2.0.0-RC.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chamilo · Chamilo LMSversion=< 1.11.38; version=>= 2.0.0-alpha.1, < 2.0.0-RC.3

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/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 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-918Server-Side Request Forgery (SSRF)
T1046Network Service Scanning
T1552.005Cloud Instance Metadata API

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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