CVE-2021-20667 Cross-site scripting in GROWI

What is CVE-2021-20667?

CVE-2021-20667 is a medium-severity cross-site scripting vulnerability in WESEEK, Inc. GROWI, published on 10 Mar 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Stored cross-site scripting vulnerability due to inadequate CSP (Content Security Policy) configuration in GROWI versions v4.2.2 and earlier allows remote authenticated attackers to inject an arbitrary script via a specially crafted content.

Weakness: CWE-79

Which versions are affected by CVE-2021-20667?

It affects 1 product.

Products include Weseek Growi.

How do I fix CVE-2021-20667?

No fix has been published for CVE-2021-20667 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-20667 being exploited?

There is no known exploitation of CVE-2021-20667 in the wild and no public exploit code.

Other vulnerabilities in WESEEK, Inc. GROWI

• CVE-2021-20736 SQL injection in GROWI Critical 9.1
• CVE-2019-5968 Cross-site request forgery in GROWI High 8.8
• CVE-2021-20670 Information disclosure in GROWI High 7.5
• CVE-2020-5682 Denial of service in GROWI High 7.5
• CVE-2020-5683 Path traversal in GROWI High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-62f6-wgjc-3prq.