CVE-2024-37657: An open redirect vulnerability in gnuboard5 v.5.5.16 allows a remote attacker to obtain sensitive information

Routine

MEDIUM 6.1DOWNGRADE

CVE-2024-37657 is a medium-severity flaw (CVSS 6.1) affecting gnuboard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An open redirect vulnerability in gnuboard5 v.5.5.16 allows a remote attacker to obtain sensitive information via thebbs/login.php component.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-601
Published	2025-07-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sir

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-07-07 18:15 UTCPublished CVE record published
2026-06-17 07:38 UTCUpdated Record last modified

sir gnuboard DOWNGRADE

Affected: 5.5.16

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.5.16

1. Check installed version

apt-cache policy gnuboard || rpm -q gnuboard || gnuboard --version

2. No fixed release: DOWNGRADE to a release before 5.5.16 (Debian / Ubuntu)

apt-cache madison gnuboard sudo apt install gnuboard=<VERSION_BEFORE_5.5.16> sudo apt-mark hold gnuboard

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list gnuboard sudo dnf downgrade gnuboard-<VERSION_BEFORE_5.5.16> sudo dnf versionlock add gnuboard

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-37657?

gnuboard: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-37657 being exploited?

CVE-2024-37657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-37657 affect?

CVE-2024-37657 affects gnuboard. Severity is medium (CVSS 6.1). An open redirect vulnerability in gnuboard5 v.5.5.16 allows a remote attacker to obtain sensitive information via thebbs/login.php component.

How urgent is CVE-2024-37657?

Priority 31/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2025-7786 LOW 3.5 UPGRADE A vulnerability, which was classified as problematic, has been found in Gnuboard g6 up to 6.0.10
CVE-2025-61464 MEDIUM 6.5 UPGRADE gnuboard gnuboard4 v4.36.04 and before is vulnerable to Second-order SQL Injection via the search_table in bbs
CVE-2025-60859 MEDIUM 6.1 DOWNGRADE Cross Site Scripting (XSS) vulnerability in Gnuboard 5.6.15 allows authenticated attackers to execute arbitrar
CVE-2024-41475 HIGH 8.8 DOWNGRADE Gnuboard g6 6.0.7 is vulnerable to Session hijacking due to a CORS misconfiguration.
CVE-2024-39097 MEDIUM 6.1 UPGRADE There is an Open Redirect vulnerability in Gnuboard v6.0.4 and below via the `url` parameter in login path.

References

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