CVE-2021-20670

Name: CVE-2021-20670
Creator: NVD / NIST
Published: 2021-03-10T10:15:12.817+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.51%

Last modified Jun 17, 2026

CVE-2021-20670 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Improper access control vulnerability in GROWI versions v4.2.2 and earlier allows a remote unauthenticated attacker to read the user's personal information and/or server's internal information via unspecified vectors.. EPSS estimates a 1.51% chance of exploitation in the next 30 days.

Description

Improper access control vulnerability in GROWI versions v4.2.2 and earlier allows a remote unauthenticated attacker to read the user's personal information and/or server's internal information via unspecified vectors.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.51%

71.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Weseek	Growi	<= 4.2.2

References

https://jvn.jp/en/vu/JVNVU94889258/index.htmlThird Party Advisory
https://weseek.co.jp/security/2021/03/08/vulnerability/growi-prevent-multiple-xss/Vendor Advisory
https://jvn.jp/en/vu/JVNVU94889258/index.htmlThird Party Advisory
https://weseek.co.jp/security/2021/03/08/vulnerability/growi-prevent-multiple-xss/Vendor Advisory

Timeline

Published: Mar 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20670?

How severe is CVE-2021-20670?

CVE-2021-20670 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.51% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20670?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20670?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST