CVE-2024-40125: An Arbitrary File Upload
Source CVE Database V5
Not known to be exploited · CVSS 9.8 Critical.
Data as of 26 Oct 2026, 08:30 UTC
- EPSS
- 0.8% chance of exploitation in 30 days – higher than 58% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 19 Sep 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Until an official patch is released, organizations should implement the following mitigations: 1) Restrict access to the Media Manager upload endpoint using network-level controls such as firewalls or VPNs to limit exposure to trusted users only. 2) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious file uploads, especially those containing PHP or other executable code. 3) Implement strict input validation and file type restrictions on the upload functionality, if configurable, to prevent uploading executable files. 4) Monitor server logs and network traffic for unusual upload activity or execution of unexpected scripts. 5) Isolate the CLESS Server environment to minimize potential lateral movement in case of compromise. 6) Prepare for rapid patch deployment by closely monitoring Closed-Loop Technology advisories and CVE updates. 7) Conduct regular backups and ensure recovery plans are tested to mitigate impact from potential attacks. 8) Consider disabling or limiting the Media Manager feature if not essential to operations.
Description
An arbitrary file upload vulnerability in the Media Manager function of Closed-Loop Technology CLESS Server v4.5.2 allows attackers to execute arbitrary code via uploading a crafted PHP file to the upload endpoint.