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CVE-2026-102121 – Unauthenticated Sensitive Information Exposure – Kiteworks Secure Data Forms befor

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Summary

CVE-2026-102121 is a high-severity information disclosure vulnerability in the Advanced Forms component of Kiteworks Secure Data Forms. An unauthenticated, network-reachable form-rendering interface returns more data than required to display a published form, exposing the form owner’s account profile and portions of the deployment’s configuration settings. The vulnerability is rated 8.6 (High) on the CVSS v3.1 scale and affects all Secure Data Forms deployments prior to version 9.5.1.

Technical details

  • Root cause: The form-rendering interface used to display published forms to anonymous visitors lacks proper authentication controls (CWE-306) and returns sensitive data beyond what rendering the form actually requires (CWE-200).
  • Trigger conditions: An attacker only needs to know (or guess) the web address of a published form; no credentials, privileges, or user interaction are required.
  • Attack vector: Network — the flaw is exploitable remotely over HTTP(S) against any internet-exposed form endpoint.
  • Impact: Disclosure of the form owner’s Kiteworks account profile details (e.g., personal information) and deployment configuration settings. Passwords, authentication tokens, and MFA secrets are not exposed, and the issue does not affect integrity or availability.

Affected software

  • Kiteworks Secure Data Forms (Advanced Forms component) — all versions prior to 9.5.1

Severity

  • CVSS v3.1 Base Score: 8.6 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Mitigation and recommended actions

  • Immediate: Upgrade Kiteworks to version 9.5.1 or later, which resolves the unauthenticated data exposure in the form-rendering interface.
  • If immediate patching is not possible: Restrict or monitor network access to published form endpoints where feasible, and review exposed form URLs to determine whether they have been accessed by unexpected or unauthorized parties until the upgrade can be applied.

References

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