CVE-2026-39878: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in chamilo chamilo-lms
Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user registration form that allows any unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeover. This has been patched in 1.11.40.
AI Analysis
Technical Summary
CVE-2026-39878 is a stored cross-site scripting vulnerability (CWE-79) affecting Chamilo LMS up to version 1.11.38. The vulnerability exists in the user registration form, where input is not properly neutralized during web page generation. An unauthenticated attacker can exploit this to execute arbitrary JavaScript in an administrator's session, resulting in complete administrative control over the platform. The issue is fixed in Chamilo LMS version 1.11.40.
Potential Impact
Successful exploitation allows an unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeover. This compromises confidentiality and integrity of the platform and can result in complete loss of administrative control.
Mitigation Recommendations
A fix is available in Chamilo LMS version 1.11.40. Users should upgrade to version 1.11.40 or later to remediate this vulnerability. No vendor advisory content was provided, so patch status is based on the provided description.
CVE-2026-39878: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in chamilo chamilo-lms
Description
Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user registration form that allows any unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeover. This has been patched in 1.11.40.
CVSS v3.1
Score 9.3critical
Affected software
pkg:github/chamilo/chamilo-lmsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-39878 is a stored cross-site scripting vulnerability (CWE-79) affecting Chamilo LMS up to version 1.11.38. The vulnerability exists in the user registration form, where input is not properly neutralized during web page generation. An unauthenticated attacker can exploit this to execute arbitrary JavaScript in an administrator's session, resulting in complete administrative control over the platform. The issue is fixed in Chamilo LMS version 1.11.40.
Potential Impact
Successful exploitation allows an unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeover. This compromises confidentiality and integrity of the platform and can result in complete loss of administrative control.
Mitigation Recommendations
A fix is available in Chamilo LMS version 1.11.40. Users should upgrade to version 1.11.40 or later to remediate this vulnerability. No vendor advisory content was provided, so patch status is based on the provided description.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-07T20:32:03.010Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5e61922a4a8d59897a5053
Added to database: 07/20/2026, 17:57:38 UTC
Last enriched: 07/20/2026, 18:12:11 UTC
Last updated: 07/21/2026, 07:20:56 UTC
Views: 12
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