CVE-2026-53620

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.

GROWI provided by GROWI, Inc. is vulnerable to a regular expression denial of service (ReDoS) via a crafted input string.

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.

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.

GROWI contains an incorrect authorization vulnerability. If exploited, an unauthenticated attacker could retrieve other users' bookmark data.

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.