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.
PUBLISHED5.2CWE-78x_open-source
OpenBullet2 0.3.2 Authenticated RCE via FileProxySource Script Upload
Problem type
Affected products
openbullet
openbullet2
<= 0.3.2 - AFFECTED
References
hackernoon.com
https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2
vulncheck.com
https://www.vulncheck.com/advisories/openbullet2-authenticated-rce-via-fileproxysource-script-upload
JSON source
https://cveawg.mitre.org/api/cve/CVE-2026-25855Click to expand
{
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"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-25855",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"dateUpdated": "2026-06-08T16:49:34.140Z",
"dateReserved": "2026-02-06T19:12:03.462Z",
"datePublished": "2026-06-08T16:49:34.140Z",
"state": "PUBLISHED"
},
"containers": {
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"dateUpdated": "2026-06-08T16:49:34.140Z"
},
"datePublic": "2026-06-05T00:00:00.000Z",
"title": "OpenBullet2 0.3.2 Authenticated RCE via FileProxySource Script Upload",
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"affected": [
{
"vendor": "openbullet",
"product": "openbullet2",
"repo": "https://github.com/openbullet/openbullet2",
"defaultStatus": "affected",
"versions": [
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"version": "0.2.5",
"status": "affected",
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"problemTypes": [
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"descriptions": [
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"description": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
"cweId": "CWE-78",
"type": "CWE"
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"references": [
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"url": "https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2",
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{
"url": "https://www.vulncheck.com/advisories/openbullet2-authenticated-rce-via-fileproxysource-script-upload",
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"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
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"credits": [
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