Open edX Platform enables the authoring and delivery of online learning at any scale. Prior to commit 59bb6d6, the view function set_course_mode_price() at lms/djangoapps/instructor/views/instructor_dashboard.py:430 is decorated only with @login_required and performs no course-level permission check. Any authenticated user — including a learner account with zero course roles — can issue a single POST request to overwrite the honor mode price and currency of any course on the platform. The companion frontend modal was removed in a prior cleanup, but the URL route and view remain live, making this an unguarded orphan endpoint. This issue has been patched via commit 59bb6d6.

CVE-2026-53635 affects the Open edX Platform, specifically the set_course_mode_price() view function in the instructor dashboard. The endpoint is only protected by @login_required and lacks any course-level permission checks. Any authenticated user, regardless of their role, can send a POST request to overwrite the honor mode price and currency for any course on the platform. The vulnerability exists because a frontend modal was removed during a cleanup but the underlying URL route and backend view were left active, creating an unguarded orphan endpoint. This constitutes a broken access control vulnerability with potential financial and integrity impact. The issue has been patched in commit 59bb6d6 along with additional related commits. Platform administrators should apply the patch immediately to prevent unauthorized price manipulation.