Authenticated File Upload Vulnerability in File Thingie by File Thingie Team
CVE-2023-53942

9.4CRITICAL

Key Information:

Vendor

Leefish

Status
File Thingie
Vendor
CVE Published:
18 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2023-53942?

File Thingie version 2.5.7 is susceptible to an authenticated file upload vulnerability that can be exploited by remote attackers. By leveraging this flaw, attackers can upload malicious PHP zip archives to the web server. Once the PHP payload is on the server, it can be executed to run arbitrary system commands through a specially crafted PHP script, posing significant security risks to affected installations.

Affected Version(s)

File Thingie 2.5.7

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2023-53942 - Proof of Concept

References

https://www.exploit-db.com/exploits/51436
exploit
https://github.com/leefish/filethingie
product
https://www.vulncheck.com/advisories/file-thingie-authent...
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Maurice Fielenbach (grimlockx) - Hexastrike Cybersecurity UG (haftungsbeschränkt)
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CVE-2023-53942 : Authenticated File Upload Vulnerability in File Thingie by File Thingie Team