CVE-2026-25559
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk44th percentile - higher than 44% of all known CVEs
Summary
OpenBullet2 through version 0.3.2 contains a path traversal vulnerability in the wordlist endpoint, allowing authenticated attackers to read, write, and delete arbitrary files by supplying unsanitized absolute paths. Attackers can chain these operations to achieve remote code execution by manipulating critical system files such as /etc/passwd, as the application runs as root by default.
Risk Assessment
The risk is critical – an attacker can gain full system control via remote code execution with root privileges, leading to complete compromise of confidentiality, integrity, and availability.
Recommendation
Immediately upgrade OpenBullet2 to the latest patched version and consider running the application with reduced privileges.
Other vulnerabilities in OpenBullet2
See all- CVE-2026-25555Critical
OpenBullet2 through version 0.3.2 has an authentication bypass vulnerability in the API key authentication middleware. Unauthenticated attackers can gain admin access by supplying an empty X-Api-Key header value, as it is compared against a default empty AdminApiKey string.
- CVE-2026-39908Medium
OpenBullet2 up to version 0.3.2 on Windows has a credential disclosure vulnerability. A remote attacker can configure a proxy source with a UNC path pointing to an attacker-controlled server, causing the application to attempt SMB authentication and leak the NTLMv2 hash of the process user.
- CVE-2026-25856High
Vulnerability in OpenBullet2 up to version 0.3.2: authenticated remote code execution via creating or modifying job configurations. The plain C# execution mode lacks reference filtering, allowing access to the file system, process spawning, and arbitrary .NET API calls.
- CVE-2026-25855High
A vulnerability in OpenBullet2 through version 0.3.2 allows authenticated users to execute arbitrary commands by uploading script files (.bat, .ps1, .sh) through the FileProxySource proxy loading feature. Attackers can upload malicious script files as proxy sources, causing the server to execute the scripts and return output as proxy lines, resulting in arbitrary command execution on the host as the process user.
Original NVD description (English source)
OpenBullet2 through version 0.3.2 contains a path traversal vulnerability in the wordlist endpoint that allows authenticated attackers to perform arbitrary file read, write, and delete operations by supplying unsanitized absolute paths to the upload handler and wordlist functions. Attackers can chain the file write and delete primitives to achieve remote code execution by manipulating critical system files such as /etc/passwd, with full system impact since the application runs as root by default.