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In cPanel before 88.0.3, an insecure site password is used for Mailman on a templated VM (SEC-551).
Use CWE-521, Cpanel vendor hub and Cpanel product page to widen CVE-2020-26103 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.