CVE-2021-31933

CVSS 7.2 HIGHEPSS 13.9%

Vexday Risk Score

46Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS 7.2EPSS 13.9%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

30 Apr 2021Published on NVD

14 May 2021Public PoC

Weaponization speed

13 daysto first PoC

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

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

Affected products

n/a · n/a

public PoCs found — 2

cve_referencepacketstormsecurity.com/files/162572/Chamilo-LMS-1.11.14-Remote-Code-Execution.htmlunverified exploitdbwww.exploit-db.com/exploits/49867unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

http://packetstormsecurity.com/files/162572/Chamilo-LMS-1.11.14-Remote-Code-Execution.html https://github.com/chamilo/chamilo-lms/commit/229302139e8d23bf6862183cf219b967f6e2fbc1 https://github.com/chamilo/chamilo-lms/commit/f65d065061a77bb2e84f73217079ce3998cf3453 https://support.chamilo.org/projects/1/wiki/Security_issues#Issue-48-2021-04-17-Critical-impact-high-risk-Remote-Code-Execution