CVE-2026-84205
Received Received - Intake

Access Control Bypass in GROWI via Revision Endpoint

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: VulnCheck

Description
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.

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Meta Information

Published
2026-09-01
Last Modified
2026-09-01
Generated
2026-09-01
AI Q&A
2026-09-01
EPSS Evaluated
N/A
NVD
CVE-2026-84205
EUVD
EUVD-2026-69292

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
growilabs growi 8.0.2

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

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Executive Summary

GROWI has an access control flaw in the GET /_api/v3/revisions/:id endpoint. It checks access using a query parameter but returns the revision specified by the path parameter without verifying they match the same page. This allows authenticated attackers to access revision content from pages they are not permitted to view by combining a page ID they can access with an arbitrary revision ID.

Detection Guidance

To detect this vulnerability, check GROWI logs for unauthorized access attempts to the /_api/v3/revisions/:id endpoint. Look for mismatches between query parameter page IDs and path parameter revision IDs. Manually verify if users can access revisions from pages they shouldn't have permission to view.

Impact Analysis

An attacker with valid credentials could read sensitive revision history from restricted pages, potentially exposing confidential data such as drafts, previous versions of documents, or internal discussions. This could lead to data breaches or unauthorized information disclosure.

Compliance Impact

This vulnerability could violate compliance requirements that mandate strict access controls and protection of sensitive data, such as GDPR (data privacy) or HIPAA (health information). Unauthorized access to revision content may result in non-compliance, legal penalties, or reputational damage.

Mitigation Strategies

Update GROWI to the latest patched version immediately. Implement strict access controls to ensure users can only access revisions for pages they have permission to view. Review all recent revision access logs for signs of exploitation.

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