Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows attackers to bypass the add_issue_notes permission requirement by leveraging the incoming mail handler.

Insufficient input validation in the Git repository integration of Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows Redmine users to read arbitrary local files accessible by the application server process.

Redmine before 4.0.8 and 4.1.x before 4.1.2 allows attackers to discover the names of private projects if issue-journal details exist that have changes to project_id values.

Redmine before 4.0.7 and 4.1.x before 4.1.1 has stored XSS via textile inline links.

Redmine before 4.0.7 and 4.1.x before 4.1.1 allows attackers to discover the subject of a non-visible issue by performing a CSV export and reading time entries.

Redmine before 3.4.13 and 4.x before 4.0.6 mishandles markup data during Textile formatting.

Redmine before 4.0.7 and 4.1.x before 4.1.1 has XSS via the back_url field.

Redmine before 4.0.8 and 4.1.x before 4.1.2 allows attackers to bypass the add_issue_notes permission requirement by leveraging the Issues API.

Redmine 4.1.x before 4.1.2 allows XSS because an issue's subject is mishandled in the auto complete tip.

A SQL injection vulnerability in Redmine through 3.2.9 and 3.3.x before 3.3.10 allows Redmine users to access protected information via a crafted object query.