CVE-2026-80191
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk39th percentile - higher than 39% of all known CVEs
Summary
GROWI applies its page-viewer permission check to attachment requests only when the request carries an authenticated user. retrieveAttachmentFromIdParam skips the check when the user is null, so a request without a session skips the check and returns the file. An unauthenticated attacker with an attachment identifier can download the file even if the page is private. Version 8.0.2 checks both authenticated and unauthenticated requests.
Risk Assessment
Unauthorized individuals can access private files, potentially leading to sensitive information disclosure.
Recommendation
Upgrade GROWI to version 8.0.2 or later, which includes the fix.
Other vulnerabilities in GROWI
See all- CVE-2026-41951High
A path traversal vulnerability exists in GROWI v7.5.0 and earlier, which may allow an attacker to execute arbitrary EJS templates on the server when an email server is running in GROWI.
- CVE-2026-41040High
GROWI provided by GROWI, Inc. is vulnerable to a regular expression denial of service (ReDoS) via a crafted input string.
- CVE-2026-100727Medium
An improper access control vulnerability exists in GROWI, which allows an unauthenticated attacker to read files contained in non-public pages of the affected product when the file upload setting is configured as "Local".
- CVE-2026-84205Medium
GROWI contains an access control vulnerability in the GET /_api/v3/revisions/:id endpoint that validates access against a query parameter but returns the revision identified by the path parameter without confirming they reference the same page. Authenticated attackers can pair a page identifier they can access with an arbitrary revision identifier to read revision content from pages they lack permission to view.
- CVE-2026-84204Medium
GROWI contains an access control vulnerability in the GET /_api/v3/attachment/:id endpoint that fails to validate page access permissions. Authenticated attackers can retrieve attachment metadata from pages they cannot view by supplying known attachment identifiers.
- CVE-2026-68951Medium
GROWI contains an incorrect authorization vulnerability. If exploited, an unauthenticated attacker could retrieve other users' bookmark data.
- CVE-2026-53620Medium
GROWI contains an authorization bypass vulnerability through user-controlled key in bookmark folder APIs. An authenticated attacker could retrieve, tamper with, and/or delete other users' bookmark data.
- CVE-2025-64700Medium
Cross-site request forgery vulnerability exists in GROWI v7.3.3 and earlier. If a user views a malicious page while logged in, the user may be tricked to do unintended operations.
Original NVD description (English source)
GROWI applies its page-viewer permission check to attachment requests only when the request carries an authenticated user. retrieveAttachmentFromIdParam in apps/app/src/server/routes/attachment/get.ts guards the check with a condition requiring the user to be non-null, so a request that carries no session skips the check entirely and the handler returns the file. The routes reached this way, /attachment/:id and /download/:id, take the attachment identifier from the path, so an unauthenticated caller who has an attachment identifier receives the file regardless of whether the page owning it is private and regardless of whether that caller would be permitted to view the page. Identifiers can be retained by a user whose access was later removed, or recovered from anywhere the identifier was previously exposed. Version 8.0.2 runs the check for authenticated and unauthenticated requests alike, skipping it only where a valid share link has already bound the requested file to that link's page.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS