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An issue has been discovered in GitLab CE/EE affecting all versions from 11.1 before 17.10.7, 17.11 before 17.11.3, and 18.0 before 18.0.1. Improper XPath validation allows modified SAML response to bypass 2FA requirement under specialized conditions.
Reserved 2024-12-03 | Published 2025-05-22 | Updated 2025-05-22 | Assigner GitLabCWE-1288: Improper Validation of Consistency within Input
Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program
gitlab.com/gitlab-org/gitlab/-/issues/507445 (GitLab Issue #507445)
hackerone.com/reports/2851261 (HackerOne Bug Bounty Report #2851261)
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