CVE-2025-50186Public exploitNetwork attack vector

Stored XSS via unsanitized CSV filenames

Published Mar 2, 2026 · Updated Mar 2, 2026

Stored XSS in Chamilo LMS before 1.11.30 allows remote authenticated users to execute JavaScript via a crafted CSV filename. main/admin/user_import.php stores the raw import_file name and passes it to CSV parsing, allowing later pages to render embedded markup without output encoding. The attacker needs file-upload access, or must induce an authorized user to upload the file, and execution requires a user to view the import result or history.

CVSS severity4.8
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Chamilo LMS before 1.11.30 allows remote authenticated users to execute JavaScript via a crafted CSV filename. main/admin/user_import.php stores the raw import_file name and passes it to CSV parsing, allowing later pages to render embedded markup without output encoding. The attacker needs file-upload access, or must induce an authorized user to upload the file, and execution requires a user to view the import result or history.

The record

CVE
CVE-2025-50186
Published
Mar 2, 2026
Updated
Mar 2, 2026
Vendor
Chamilo
Product
Chamilo LMS
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 2, 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=< 1.11.30

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chamilo · Chamilo LMSversion=< 1.11.30

Published CVSS scores

4.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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