CVE-2024-6740: Openfind's Mail2000 does not properly validate email atachments, allowing unauthenticated remote attackers to

Routine

MEDIUM 6.1DOWNGRADE

CVE-2024-6740 is a medium-severity flaw (CVSS 6.1) affecting mail2000. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Openfind's Mail2000 does not properly validate email atachments, allowing unauthenticated remote attackers to inject JavaScript code within the attachment and perform Stored Cross-site scripting attacks.

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	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-07-15
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

2024-07-15 08:15 UTCPublished CVE record published
2026-06-17 08:18 UTCUpdated Record last modified

openfind mail2000 DOWNGRADE

Affected: 7.0 · 8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)

apt-cache madison mail2000 sudo apt install mail2000=<VERSION_BEFORE_7.0> sudo apt-mark hold mail2000

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

dnf --showduplicates list mail2000 sudo dnf downgrade mail2000-<VERSION_BEFORE_7.0> 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-2024-6740?

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

Is CVE-2024-6740 being exploited?

CVE-2024-6740 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-2024-6740 affect?

CVE-2024-6740 affects mail2000. Severity is medium (CVSS 6.1). Openfind's Mail2000 does not properly validate email atachments, allowing unauthenticated remote attackers to inject JavaScript code within the attachment and perform Stored Cross-site scripting attacks.

How urgent is CVE-2024-6740?

Priority 37/100. Public exploit reference

Related CVEs

CVE-2024-6741 MEDIUM 5.8 DOWNGRADE Openfind's Mail2000 has a vulnerability that allows the HttpOnly flag to be bypassed
CVE-2024-5400 HIGH 8.8 DOWNGRADE Openfind Mail2000 does not properly filter parameters of specific CGI
CVE-2024-5399 HIGH 7.2 DOWNGRADE Openfind Mail2000 does not properly filter parameters of specific API

References

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