Blossom through 1.17.1 contains an authorization bypass vulnerability that allows authenticated users to access other users' folders because FolderService queries filter only on folder id. Attackers can supply another user's folder id to /folder/info, /folder/upd, /folder/open or /folder/del to read storage paths, rename, toggle visibility, or delete folders.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 1
- First seenCVSS 5.3 · blossom-editorNVD modified 2026-10-30 14:16
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 6
- https://github.com/blossom-editor/blossom/issues/213 issue-tracking
- https://github.com/blossom-editor/blossom/blob/v1.17.1/blossom-backend/backend/src/main/java/com/blossom/backend/server/folder/FolderService.java#L123-L202 technical-description
- https://github.com/blossom-editor/blossom/blob/v1.17.1/blossom-backend/backend/src/main/resources/mapper/FolderMapper.xml#L64-L92 technical-description
- https://hackmd.io/@hieuPenguinnn/blossom-folder-idor-cross-user-modify-delete third-party-advisory
- https://github.com/blossom-editor/blossom product
- https://www.vulncheck.com/advisories/blossom-through-1.17.1-authorization-bypass-via-folder-endpoints third-party-advisory