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Fencer Vulns
high 7.2

CVE-2021-31933 in the critical feed json

A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file upl…

published 2021-04-30 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18806

cvss
7.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
13.9%
EPSS 13.9% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

Timeline

  1. Published
  2. First public exploit (EDB-49867)

Exploit prediction

13.93% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-49867 Chamilo LMS 1.11.14 - Remote Code Execution (Authenticated) webapps, 2021-05-14
  • packetstormsecurity.com http://packetstormsecurity.com/files/162572/Chamilo-LMS-1.11.14-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.2 CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:U/UI:N
CNA 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Classification

Weakness
  • CWE-706 Use of Incorrectly-Resolved Name or Reference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.