CVE-2026-119659

medium

Description

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.

References

https://www.vulncheck.com/advisories/blossom-through-1.17.1-authorization-bypass-via-folder-endpoints

https://hackmd.io/@hieuPenguinnn/blossom-folder-idor-cross-user-modify-delete

https://github.com/blossom-editor/blossom/issues/213

https://github.com/blossom-editor/blossom/blob/v1.17.1/blossom-backend/backend/src/main/resources/mapper/FolderMapper.xml#L64-L92

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

https://github.com/blossom-editor/blossom

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-114075

Details

Source: Mitre, NVD

Published: 2026-10-30

Updated: 2026-10-30

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Severity: Medium

CVSS v4

Base Score: 5.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00263