What is the CVSS score of EUVD-2026-21531?

EUVD-2026-21531 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of PHP are affected by EUVD-2026-21531?

Chamilo LMS versions before 1.11.38 and 2.0.0-RC.3 contain a critical file upload vulnerability that allows authenticated teachers to execute arbitrary code on the server by uploading PHP webshells…. A patch is available.

How to fix or mitigate EUVD-2026-21531?

Within 24 hours: Inventory all Chamilo LMS deployments and identify current versions. Within 7 days: Apply vendor patch-upgrade to Chamilo 1.11.38 or 2.0.0-RC.3 (or later stable release). Within 30 days: Conduct file system audit of web-accessible upload directories for suspicious .php files with audio MIME types; review teacher account activity logs from deployment date to patch date for unauthorized exercise uploads.

PHP EUVD-2026-21531

| CVE-2026-32931 HIGH

Unrestricted Upload of File with Dangerous Type (CWE-434)

2026-04-10 security-advisories@github.com

PHP RCE File Upload

7.5

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 17, 2026 - 21:37 vuln.today

cvss_changed

Analysis Updated

Apr 16, 2026 - 05:58 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

1.11.38,2.0.0-RC.3

EUVD ID Assigned

Apr 10, 2026 - 18:22 euvd

EUVD-2026-21531

Analysis Generated

Apr 10, 2026 - 18:22 vuln.today

CVE Published

Apr 10, 2026 - 18:16 nvd

HIGH 7.5

DescriptionNVD

Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, an unrestricted file upload vulnerability in the exercise sound upload function allows an authenticated teacher to upload a PHP webshell by spoofing the Content-Type header to audio/mpeg. The uploaded file retains its original .php extension and is placed in a web-accessible directory, enabling Remote Code Execution as the web server user (www-data). This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.

AnalysisAI

Remote code execution in Chamilo LMS versions prior to 1.11.38 and 2.0.0-RC.3 allows authenticated teachers to upload PHP webshells through the exercise sound upload function by spoofing Content-Type headers to audio/mpeg. Uploaded malicious files retain their .php extensions and execute in web-accessible directories with web server privileges (www-data). …

RemediationAI

Within 24 hours: Inventory all Chamilo LMS deployments and identify current versions. Within 7 days: Apply vendor patch-upgrade to Chamilo 1.11.38 or 2.0.0-RC.3 (or later stable release). …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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EUVD-2026-21531 vulnerability details – vuln.today

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PHP EUVD-2026-21531

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code