Outerbase Studio: Stored XSS in Text Widget Leads to Authentication Token Exposure
Summary
A Stored Cross-Site Scripting (XSS) issue previously existed in the Text Widget in Board of Outerbase Studio where unsanitized HTML could be rendered using dangerouslySetInnerHTML
Steps to Reproduce
- Create a new dashboard.
- Add a Text widget.
- Insert the following payload:
<img src=x onerror="alert('XSS Executed\nToken: ' + localStorage.getItem('ob-token'))">Architectural Context
Outerbase Cloud and its backend services were discontinued in 2025.
The current version of Outerbase Studio operates purely as a client-side application, with dashboard data stored locally in the browser.
Impact
In the current architecture, the impact is limited to local self-XSS within a user's browser session. The previously described scenarios involving:
- authentication token theft
- account takeover
- database access
are no longer applicable since there are no active backend services or authentication tokens.
Remediation
The unsafe HTML rendering in the Text Widget has been removed in commit https://github.com/outerbase/studio/commit/b06fb85e5967440278d5a815721b360920566ab9 by eliminating the use of dangerouslySetInnerHTML.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @outerbase/studio | <= 0.10.2 | no fix |
References
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- npm
- Package
@outerbase/studio- Disclosed
- 19.06.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-wwf9-7jrc-rv4q - CC BY 4.0
Vulnerability history: @outerbase/studio
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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