CVE-2021-31933
A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input...
A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.
- Record
CVE-2021-31933- CVSS 3.1
- 7.2 High
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:U/UI:N - Updated
- 2026-11-02
EUVDEUVD-2021-18806
A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.
- Record
EUVD-2021-18806- CVSS 3.1
- 7.2 High
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:U/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-ch7w-rg8w-hgcj
A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input...
A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.
- Record
GHSA-ch7w-rg8w-hgcj- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.
- Record
CVE-2021-31933- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-706
- Updated
- 2026-11-02
OSV
A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.
- Record
CVE-2021-31933- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Chamilo LMS 1.11.14 - Remote Code Execution (Authenticated) | 2021-05-14 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-31933 is a high vulnerability (CVSS 7.2) in Chamilo, published April 30, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 13.9%, the 96th percentile. No source names a fixed version.
References
support.chamilo.org/projects/1/wiki/Security_issues
github.com/chamilo/chamilo-lms/commit/f65d065061a77bb2e84f73217079ce3998cf3453
packetstormsecurity.com/files/162572/Chamilo-LMS-1.11.14-Remote-Code-Execution.html
nvd.nist.gov/vuln/detail/CVE-2021-31933