CVE-2025-52475Network attack vector

Browser script execution via unsafe hidden-input construction

Published Mar 2, 2026 · Updated Mar 2, 2026

Reflected XSS in Chamilo LMS before 1.11.30 allows remote attackers to execute JavaScript in an administrator's browser via a crafted URL. The user-list table manually concatenates keyword_inactive into a hidden HTML input without sufficient attribute encoding. Exploitation requires an authenticated administrator to open the URL and press Alt+Shift+X on Windows or Linux, or Ctrl+Alt+X on macOS.

CVSS severity5.1
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Chamilo LMS before 1.11.30 allows remote attackers to execute JavaScript in an administrator's browser via a crafted URL. The user-list table manually concatenates keyword_inactive into a hidden HTML input without sufficient attribute encoding. Exploitation requires an authenticated administrator to open the URL and press Alt+Shift+X on Windows or Linux, or Ctrl+Alt+X on macOS.

The record

CVE
CVE-2025-52475
Published
Mar 2, 2026
Updated
Mar 2, 2026
Vendor
Chamilo
Product
Chamilo LMS
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Chamilo · Chamilo LMSversion=< 1.11.30

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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