Unauthenticated Remote Code Execution in GitBucket by Exploiting Weak Tokens
CVE-2018-25332

9.3CRITICAL

Key Information:

Vendor

Gitbucket

Status
Gitbucket
Vendor
CVE Published:
17 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-25332?

GitBucket 4.23.1 is susceptible to an unauthenticated remote code execution vulnerability that can be exploited by attackers to execute arbitrary commands. This vulnerability arises from the use of weak secret token generation and insecure file upload functionality. Attackers may potentially brute-force the Blowfish encryption key and upload a malicious JAR plugin through the git-lfs endpoint. Furthermore, they can run system commands via another exposed exploit endpoint, compromising the security of the affected system.

Affected Version(s)

GitBucket 4.23.1

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-2018-25332 - Proof of Concept

References

https://www.exploit-db.com/exploits/44668
exploit
https://security.szurek.pl/
product
https://github.com/gitbucket/gitbucket
product

CVSS V4

Score:
9.3
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

Kacper Szurek
.