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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
blossom-editor Blossom unaffected
Version Status Constraints
0 affected ≤ 1.17.1

No data.

No data.

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Project Subscriptions

Vendors Products
Wangyunf Subscribe
Blossom Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/blossom-editor/blossom cve-icon cve-icon
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 cve-icon cve-icon
https://github.com/blossom-editor/blossom/blob/v1.17.1/blossom-backend/backend/src/main/resources/mapper/FolderMapper.xml#L64-L92 cve-icon cve-icon
https://github.com/blossom-editor/blossom/issues/213 cve-icon cve-icon
https://hackmd.io/@hieuPenguinnn/blossom-folder-idor-cross-user-modify-delete cve-icon cve-icon
https://www.vulncheck.com/advisories/blossom-through-1.17.1-authorization-bypass-via-folder-endpoints cve-icon cve-icon
History

Fri, 30 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
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.
Title Blossom through 1.17.1 Authorization Bypass via Folder Endpoints
First Time appeared Wangyunf
Wangyunf blossom
Weaknesses CWE-639
CPEs cpe:2.3:a:wangyunf:blossom:*:*:*:*:*:*:*:*
Vendors & Products Wangyunf
Wangyunf blossom
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-30T14:16:20.531Z

Reserved: 2026-10-30T13:43:48.691Z

Link: CVE-2026-119659

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-30T15:16:50.033

Modified: 2026-10-30T15:16:50.033

Link: CVE-2026-119659

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-30T15:45:15Z

Weaknesses