Description
OpenBullet2 through version 0.3.2 contains an authenticated remote code execution vulnerability that allows authenticated users to execute arbitrary C# code on the server host by creating or modifying job configurations. Attackers can leverage the plain C# execution mode, which lacks reference filtering or API restrictions, to access the file system, spawn processes, and invoke arbitrary .NET APIs as the process user.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| openbullet | openbullet2 | ≤ 0.3.2 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
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OpenBullet2 Unauthenticated RCE via Config Configuration Interface
exploit/multi/http/openbullet2_unauth_rce_cve_2026_25856
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2 technical-description exploit
- https://www.vulncheck.com/advisories/openbullet2-authenticated-rce-via-job-configuration-interface third-party-advisory