- Description
- Bitwarden Server prior to v2026.4.0 contains a missing authorization vulnerability that allows a provider service user to add an arbitrary organization to their provider via `POST /providers/{providerId}/clients/existing`, resulting in takeover of the target organization; self-hosted installations are unaffected as this endpoint is restricted to Cloud via SelfHosted(NotSelfHostedOnly = true).
- Source
- disclosure@vulncheck.com
- NVD status
- Analyzed
- Products
- server
CVSS 4.0
- Type
- Secondary
- Base score
- 8.9
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity
- HIGH
CVSS 3.1
- Type
- Primary
- Base score
- 9.1
- Impact score
- 6
- Exploitability score
- 2.3
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- Severity
- CRITICAL
- disclosure@vulncheck.com
- CWE-862
- Hype score
- Not currently trending
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"criteria": "cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1FFBA33C-CD25-49B7-BBA4-1B887C34CC2E",
"versionEndExcluding": "2026.4.0",
"vulnerable": true
}
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"negate": false,
"operator": "OR"
}
]
}
]