Auth bypass in Growi, Inc. Growi

CVE-2026-53620

GROWI contains a vulnerability with an authorization bypass through user-controlled key in the bookmark folder APIs. If this vulnerability is exploited, an authenticated attacker could retrieve, tamper with, and/or delete the other user's bookmark data.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (20.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-53620: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-53620?
CVE-2026-53620 is a medium-severity vulnerability in Growi, Inc. Growi, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.3/10. Published 2026-08-31.
How severe is CVE-2026-53620?
Medium severity. CVSS v3 base score is 6.3 out of 10.