CVE-2024-5400: Openfind Mail2000 does not properly filter parameters of specific CGI

This month

HIGH 8.8DOWNGRADE

CVE-2024-5400 is a high-severity flaw (CVSS 8.8) affecting mail2000. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Openfind Mail2000 does not properly filter parameters of specific CGI. Remote attackers with regular privileges can exploit this vulnerability to execute arbitrary system commands on the remote server.

Why this priority

High severity

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-78
Published	2024-05-27
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: openfind

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

Am I affected?

Timeline

2024-05-27 06:15 UTCPublished CVE record published
2026-06-17 08:15 UTCUpdated Record last modified

openfind mail2000 DOWNGRADE

Affected: 6.0 · 7.0 · 8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

1. Check installed version

apt-cache policy mail2000 || rpm -q mail2000 || mail2000 --version

2. No fixed release: DOWNGRADE to a release before 6.0 (Debian / Ubuntu)

apt-cache madison mail2000 sudo apt install mail2000=<VERSION_BEFORE_6.0> sudo apt-mark hold mail2000

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

dnf --showduplicates list mail2000 sudo dnf downgrade mail2000-<VERSION_BEFORE_6.0> sudo dnf versionlock add mail2000

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-2024-5400?

mail2000: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-5400 being exploited?

CVE-2024-5400 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-2024-5400 affect?

CVE-2024-5400 affects mail2000. Severity is high (CVSS 8.8). Openfind Mail2000 does not properly filter parameters of specific CGI. Remote attackers with regular privileges can exploit this vulnerability to execute arbitrary system commands on the remote server.

How urgent is CVE-2024-5400?

Priority 43/100. High severity

Related CVEs

CVE-2024-6741 MEDIUM 5.8 DOWNGRADE Openfind's Mail2000 has a vulnerability that allows the HttpOnly flag to be bypassed
CVE-2024-6740 MEDIUM 6.1 DOWNGRADE Openfind's Mail2000 does not properly validate email atachments, allowing unauthenticated remote attackers to
CVE-2024-5399 HIGH 7.2 DOWNGRADE Openfind Mail2000 does not properly filter parameters of specific API
CVE-2023-28705 MEDIUM 5.4 UPGRADE Openfind Mail2000 has insufficient filtering special characters of email content of its content filtering func

References

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