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Advisories

Element Web and Element Desktop before 1.12.32 Forced Logout via Guest Credential URL Parameters

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Severity
high
Date
Affecting

  • element-web >= 0, < 1.12.32

  • element-desktop >= 0, < 1.12.32

CWE
  • CWE-352 Cross-Site Request Forgery (CSRF)
CVSS
7.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Credit
Abraxas Labs, Michael Telatynski
Description
Element Web and Element Desktop before 1.12.32 accept guest credentials from URL fragment parameters in loadSession, allowing remote unauthenticated attackers to log out users and clear local stores. Attackers can lure logged-in users into opening links with guest_user_id and guest_access_token to force an attacker-controlled guest session and destroy unbacked end-to-end encryption keys.

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