Improper neutralization of special elements used in an SQL command ('SQL Injection') vulnerability in the system syncing daemon in Synology Drive Server before 3.0.4-12699, 3.2.1-23280, 3.5.0-26085 and 3.5.1-26102 allows remote attackers to inject SQL commands, limited to write operations, via unspecified vectors.
https://www.synology.com/en-global/security/advisory/Synology_SA_24_21