CVE-2004-2724: LionMax Software Chat Anywhere 2.72a allows remote attackers to cause a denial of service (server crash and cl

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HIGH 7.1DOWNGRADE

CVE-2004-2724 is a high-severity flaw (CVSS 7.1) affecting chat anywhere. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LionMax Software Chat Anywhere 2.72a allows remote attackers to cause a denial of service (server crash and client CPU consumption) via a username beginning with percent (%) followed by a null character.

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)
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-287
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: lionmax software

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:10 UTCUpdated Record last modified

lionmax software chat anywhere DOWNGRADE

Affected: 2.72a

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.72a

1. Check installed version

apt-cache policy chat-anywhere || rpm -q chat-anywhere || chat-anywhere --version

2. No fixed release: DOWNGRADE to a release before 2.72a (Debian / Ubuntu)

apt-cache madison chat-anywhere sudo apt install chat-anywhere=<VERSION_BEFORE_2.72a> sudo apt-mark hold chat-anywhere

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

dnf --showduplicates list chat-anywhere sudo dnf downgrade chat-anywhere-<VERSION_BEFORE_2.72a> sudo dnf versionlock add chat-anywhere

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-2004-2724?

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

Is CVE-2004-2724 being exploited?

CVE-2004-2724 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-2004-2724 affect?

CVE-2004-2724 affects chat anywhere. Severity is high (CVSS 7.1). LionMax Software Chat Anywhere 2.72a allows remote attackers to cause a denial of service (server crash and client CPU consumption) via a username beginning with percent (%) followed by a null character.

How urgent is CVE-2004-2724?

Priority 49/100. High severity; Public exploit reference

Related CVEs

CVE-2018-20524 MEDIUM 6.1 DOWNGRADE The Chat Anywhere extension 2.4.0 for Chrome allows XSS via crafted use of <<a> in a message, because a danmuW
CVE-2005-0522 MEDIUM 4.6 DOWNGRADE Chat Anywhere 2.72a stores sensitive information such as passwords in plaintext in the .INI file for a chatroo

References

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