v2board / Xboard Authentication Token Exposure via loginWithMailLink
Published Apr 9, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
v2board / Xboard Authentication Token Exposure via loginWithMailLink
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
V2Board 1.6.1 through 1.7.4 and Xboard through 0.1.9 expose authentication tokens in HTTP response bodies of the loginWithMailLink endpoint when the login_with_mail_link_enable feature is active. Unauthenticated attackers can POST to the loginWithMailLink endpoint with a known email address to receive the full authentication URL in the response, then exchange the token at the token2Login endpoint to obtain a valid bearer token with complete account access including admin privileges.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- chocapikk.com ↗
- Source repository ↗
- Source repository ↗
- Patch commit ↗
- Source repository ↗
- Source repository ↗
- Source repository ↗
- www.vulncheck.com ↗
Record history
Published Apr 9, 2026 · Last refreshed Nov 3, 2026