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MEDIUM severity

Outerbase Studio: Stored XSS in Text Widget Leads to Authentication Token ExposureGHSA-wwf9-7jrc-rv4q

MEDIUMFix: outerbase/studio@b06fb85

GHSA-wwf9-7jrc-rv4q is a medium-severity (CVSS 4.4) Cross-site Scripting (XSS) vulnerability in @outerbase/studio. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Also known asCVE-2026-55650
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for GHSA-wwf9-7jrc-rv4q.

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs9th percentile — riskier than 9% of all scored CVEsHighest risk
0.00%0.23%0.46%0.69%0.2%0.2%Oct 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

0other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
@outerbase/studionpm
285downloads / week

Description

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

  1. Create a new dashboard.
  2. Add a Text widget.
  3. 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are no longer applicable since there are no active backend services or authentication tokens.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 Packages

1 total
EcosystemPackageVulnerable rangeFix
📦npm@outerbase/studioall versionsNo fix

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @outerbase/studio, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of @outerbase/studio for GHSA-wwf9-7jrc-rv4q. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

## 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 1. Create a new dashboard. 2. Add a **Text widget**. 3. Insert the following payload: ```html <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 dashbo
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