CVE-2021-20829 Cross-site scripting in GROWI
Remote attackers can execute arbitrary scripts in user browsers via inadequate tag sanitization in GROWI, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-20829?
CVE-2021-20829 is a medium-severity cross-site scripting vulnerability in WESEEK, Inc. GROWI, published on 21 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Cross-site scripting vulnerability due to the inadequate tag sanitization in GROWI versions v4.2.19 and earlier allows remote attackers to execute an arbitrary script on the web browser of the user who accesses a specially crafted page.
Weakness: CWE-79
Which versions are affected by CVE-2021-20829?
It affects 1 product.
Products include Weseek Growi.
How do I fix CVE-2021-20829?
No fix has been published for CVE-2021-20829 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-2021-20829 being exploited?
There is no known exploitation of CVE-2021-20829 in the wild and no public exploit code.
Other vulnerabilities in WESEEK, Inc. GROWI
Sources
Also known as GHSA-xjjw-7hwm-mx4p.