CVE-2026-80191: Missing Authorization in GROWI, Inc. GROWI
Description
GROWI versions prior to 8.0.2 have a missing authorization check for attachment requests when the request is unauthenticated. This allows an unauthenticated attacker with knowledge of an attachment identifier to retrieve files regardless of page privacy or permission settings. Version 8.0.2 fixes this by enforcing permission checks for both authenticated and unauthenticated requests, except when a valid share link is used.
CVSS v4.0
Score 8.7high
Affected software
GROWI, Inc.
GROWI
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in GROWI affects the attachment retrieval endpoints (/attachment/:id and /download/:id). The function retrieveAttachmentFromIdParam only performs permission checks if the request is authenticated. If the request lacks authentication, the permission check is skipped, allowing unauthorized access to attachments. This means that anyone with an attachment identifier can access the file even if the page is private or the user lacks permission. The issue is fixed in version 8.0.2, which applies the permission check to all requests except those using a valid share link.
Potential Impact
An attacker can access private attachments without authentication if they know the attachment identifier. This bypasses page-viewer permissions and can lead to unauthorized disclosure of sensitive files. The vulnerability affects confidentiality but does not require user interaction or privileges.
Mitigation Recommendations
Upgrade to GROWI version 8.0.2 or later, where the authorization check is enforced for all attachment requests regardless of authentication status. Patch status is not explicitly stated, but the vendor has fixed the issue in version 8.0.2. Until upgrade, restrict access to attachment identifiers and monitor for unauthorized access attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-25T23:10:02.093Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8e23c2acd9273b49d60c56
Added to database: 08/25/2026, 23:22:42 UTC
Last enriched: 09/09/2026, 20:37:05 UTC
Last updated: 10/08/2026, 18:48:49 UTC
Views: 76
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