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Advisories

OpenMage magento-lts before 20.18.2 OAuth Callback URL Allowlist Bypass

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Severity
high
Date
Affecting

  • magento-lts >= 0, < 20.18.2

  • magento-lts >= 21.0.0-beta1, < 21.0.0-beta3

CWE
  • CWE-346 Origin Validation Error
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Credit
skeletonsec, colinmollenhour, Hanmac
Description
OpenMage magento-lts before 20.18.2 and 21.x before 21.0.0-beta3 validates OAuth 1.0a oauth_callback URLs with a string-prefix check and falls back to accepting any well-formed URL. Attackers holding a leaked consumer key and secret can supply host-suffix, userinfo, or arbitrary callback URLs to capture an approving administrator's or customer's request token and verifier, then obtain an access token with the victim's API privileges.

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