CVE-2026-84205 (CVSS 6.5)

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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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0024

Probability of exploitation

0.15%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-639 CWE-639

References

Other References

https://github.com/growilabs/growi https://github.com/growilabs/growi/blob/v8.0.2/apps/app/src/server/routes/apiv3/revisions.js https://github.com/growilabs/growi/commit/d298e0b1dbbf568c99db657fa0f7e90f72ddc59b https://github.com/growilabs/growi/pull/11810 https://www.vulncheck.com/advisories/growi-through-8.0.2-authorization-bypass-through-user-controlled-key-on-apiv3-revision-retrieval

Frequently Asked Questions

What is CVE-2026-84205? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-84205? +

CVE-2026-84205 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0024, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-84205? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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