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Advisories

v2board / Xboard Authentication Token Exposure via loginWithMailLink

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severity
critical
date
Affecting

  • v2board 1.6.1 <= 1.7.4

  • Xboard <= 0.1.9

CWE
  • CWE-201 Insertion of Sensitive Information Into Sent Data
CVSS
9.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
Valentin Lobstein (Chocapikk)
Description
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.

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