CVE-2024-40492: Cross Site Scripting vulnerability in Heartbeat Chat v.15.2.1 allows a remote attacker to execute arbitrary co

This month

HIGH 7.1DOWNGRADEDOWNGRADE

CVE-2024-40492 is a high-severity flaw (CVSS 7.1) affecting heartbeat, heartbeat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting vulnerability in Heartbeat Chat v.15.2.1 allows a remote attacker to execute arbitrary code via the setname function.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-07-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: heartbeat

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

Am I affected?

Timeline

2024-07-17 22:15 UTCPublished CVE record published
2026-06-17 07:45 UTCUpdated Record last modified

heartbeat heartbeat DOWNGRADE

Affected: 15.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.2.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 15.2.1 (Debian / Ubuntu)

apt-cache madison heartbeat sudo apt install heartbeat=<VERSION_BEFORE_15.2.1> sudo apt-mark hold heartbeat

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

dnf --showduplicates list heartbeat sudo dnf downgrade heartbeat-<VERSION_BEFORE_15.2.1> sudo dnf versionlock add heartbeat

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.

heartbeat heartbeat DOWNGRADE

Affected: 15.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.2.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 15.2.1 (Debian / Ubuntu)

apt-cache madison heartbeat sudo apt install heartbeat=<VERSION_BEFORE_15.2.1> sudo apt-mark hold heartbeat

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

dnf --showduplicates list heartbeat sudo dnf downgrade heartbeat-<VERSION_BEFORE_15.2.1> sudo dnf versionlock add heartbeat

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-2024-40492?

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

Is CVE-2024-40492 being exploited?

CVE-2024-40492 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-2024-40492 affect?

CVE-2024-40492 affects heartbeat, heartbeat. Severity is high (CVSS 7.1). Cross Site Scripting vulnerability in Heartbeat Chat v.15.2.1 allows a remote attacker to execute arbitrary code via the setname function.

How urgent is CVE-2024-40492?

Priority 44/100. High severity; Public exploit reference

References

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