What is CVE-2024-37656?

CVE-2024-37656 is a medium-severity vulnerability in Sir Gnuboard, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2025-07-07.

How severe is CVE-2024-37656?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in Sir Gnuboard

CVE-2024-37656

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.

Vulnerability class: Open Redirect

Published 2025-07-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Sir Gnuboard — versions 5.5.16

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

github.com/gnuboard/gnuboard5/issues/318 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2024-37656?: CVE-2024-37656 is a medium-severity vulnerability in Sir Gnuboard, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2025-07-07.
How severe is CVE-2024-37656?: Medium severity. CVSS v3 base score is 6.1 out of 10.