Growi Labs up to 8.0.1 Attachment get.ts retrieveAttachmentFromIdParam ID access control

Summaryinfo

A vulnerability has been found in Growi Labs Growi up to 8.0.1 and classified as problematic. This vulnerability affects the function retrieveAttachmentFromIdParam of the file apps/app/src/server/routes/attachment/get.ts of the component Attachment. Performing a manipulation of the argument ID results in access control. This vulnerability is known as CVE-2026-80191. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Growi Labs Growi up to 8.0.1. It has been classified as problematic. This affects the function retrieveAttachmentFromIdParam of the file apps/app/src/server/routes/attachment/get.ts of the component Attachment. The manipulation of the argument id with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-80191 since 08/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 8.0.2 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Growi Labs

Name

• Growi

Version

• 8.0.0
• 8.0.1

License

• free

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion