# CVE-2024-37656: Gnuboard5 - Redirect Creation

> Live exploitation tracking for CVE-2024-37656 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2024-37656

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 6.1
- **Public exploit available:** Yes
- **Affected products:** Gnuboard5
- **Weaknesses:** CWE-601 (URL Redirection to Untrusted Site ('Open Redirect'))
- **Tags:** forum

## Description

An open redirect vulnerability in Gnuboard5 v.5.5.16 allows a remote attacker to obtain sensitive information via the insufficient URL parameter verification in bbs/logout.php.

## CrowdSec analysis

[CVE-2024-37656](https://euvd.enisa.europa.eu/vulnerability/CVE-2024-37656) is an open redirect vulnerability in gnuboard5 version 5.5.16, where insufficient URL parameter verification in bbs/logout.php allows remote attackers to redirect users to malicious sites. This flaw can be exploited to steal sensitive information through phishing attacks or social engineering.

CrowdSec has been tracking this vulnerability and its exploits since 26th of November 2025.

CrowdSec has not observed any significant exploitation activity targeting CVE-2024-37656 across its network. As a result, no community-driven trend analysis is available for this vulnerability at this time.

Attackers exploit this vulnerability by sending requests to `/bbs/logout.php` or `/gnuboard5/bbs/logout.php` with a crafted `url` parameter, causing users to be redirected to attacker-controlled domains.

## Timeline

- 2025-07-07: CVE Published. CVE-2024-37656 is published to NVD.
- 2025-11-26: Rule Released. CrowdSec releases a rule to detect CVE-2024-37656 exploitation attempts against the CrowdSec Network.
- 2025-12-05: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2024-37656 for the first time.

## References

- https://github.com/gnuboard/gnuboard5/issues/318
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-37656.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2024-37656) follows observed exploitation activity for CVE-2024-37656. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.