com/mossle/cdn/CdnController.java in lemon 1.9.0 allows attackers to upload arbitrary files because the copyMultipartFileToFile method in CdnUtils only checks for a ../ substring, and does not validate the file type and spaceName parameter.
Severity
CVSS 3.0
7.5 high
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
1.2% chance of exploitation in the next 30 days; higher than 67% of CVEs (scores of 2026-10-31)