CVE-2021-20671

Description

Invalid file validation on the upload feature in GROWI versions v4.2.2 allows a remote attacker with administrative privilege to overwrite the files on the server, which may lead to arbitrary code execution.

Category

7.2
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.21% Top 20%
Vendor Advisory co.jp
Affected: WESEEK, Inc. GROWI
Published at:
Updated at:

References

Link Tags
https://weseek.co.jp/security/2021/03/08/vulnerability/growi-prevent-multiple-xss/ vendor advisory
https://jvn.jp/en/vu/JVNVU94889258/index.html third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-20671?
CVE-2021-20671 has been scored as a high severity vulnerability.
How to fix CVE-2021-20671?
To fix CVE-2021-20671, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-20671 being actively exploited in the wild?
It is possible that CVE-2021-20671 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20671?
CVE-2021-20671 affects WESEEK, Inc. GROWI.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.