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cPanel before 84.0.20 allows a demo account to achieve code execution via PassengerApps APIs (SEC-546).
Use Cpanel vendor hub and Cpanel product page to widen CVE-2020-10121 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2026-41940, CVE-2025-66429 and CVE-2021-38589 for nearby disclosures in the same product family.