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Description

OpenBullet2 through version 0.3.2 contains a remote code execution vulnerability that 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.

PUBLISHED Reserved 2026-02-06 | Published 2026-06-08 | Updated 2026-06-08 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Product status

Default status
affected

0.2.5 (semver)
affected

Credits

Maksim Rogov finder

VulnCheck finder

References

hackernoon.com/...dmin-how-an-auth-bypass-breaks-openbullet2 technical-description exploit

www.vulncheck.com/...d-rce-via-fileproxysource-script-upload third-party-advisory

cve.org (CVE-2026-25855)

nvd.nist.gov (CVE-2026-25855)

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