- Description
- Bitwarden Server before 2026.5.0 contains a JSON injection vulnerability in IntegrationTemplateProcessor.ReplaceTokens(), which substitutes user-controlled values into event-integration templates without JSON encoding. When an organization has configured an event integration whose template references a user-controlled token (such as #ActingUserName# or #UserName#, populated from a member's display name), an authenticated member can set their display name to JSON metacharacters and inject arbitrary key-value pairs into the rendered payloads delivered to webhook, SIEM, Slack, Teams, or Datadog endpoints, making injected fields indistinguishable from legitimate template output.
- Source
- disclosure@vulncheck.com
- NVD status
- Analyzed
- Products
- server
CVSS 4.0
- Type
- Secondary
- Base score
- 2.3
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/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
- LOW
CVSS 3.1
- Type
- Primary
- Base score
- 5
- Impact score
- 1.4
- Exploitability score
- 3.1
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
- Severity
- MEDIUM
- disclosure@vulncheck.com
- CWE-74
- Hype score
- Not currently trending
[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "2C860621-6544-4F8A-B634-9B5D9B5259B4",
"versionEndExcluding": "2026.5.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
]