CVE-2004-0678: Cross-site scripting (XSS) in one2planet.infolet.InfoServlet in 12Planet Chat Server 2.9 allows remote attacke

Routine

MEDIUM 4.3DOWNGRADE

CVE-2004-0678 is a medium-severity flaw (CVSS 4.3) affecting chat server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) in one2planet.infolet.InfoServlet in 12Planet Chat Server 2.9 allows remote attackers to execute arbitrary script as other users via the page parameter.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-79
Published	2004-08-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: 12planet

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

Am I affected?

Timeline

2004-08-06 04:00 UTCPublished CVE record published
2026-06-16 22:06 UTCUpdated Record last modified

12planet chat server DOWNGRADE

Affected: 2.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.9 (Debian / Ubuntu)

apt-cache madison chat-server sudo apt install chat-server=<VERSION_BEFORE_2.9> sudo apt-mark hold chat-server

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

dnf --showduplicates list chat-server sudo dnf downgrade chat-server-<VERSION_BEFORE_2.9> sudo dnf versionlock add chat-server

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: 12Planet Chat Server 2.9 - Cross-Site Scripting

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-2004-0678?

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

Is CVE-2004-0678 being exploited?

CVE-2004-0678 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-2004-0678 affect?

CVE-2004-0678 affects chat server. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) in one2planet.infolet.InfoServlet in 12Planet Chat Server 2.9 allows remote attackers to execute arbitrary script as other users via the page parameter.

How urgent is CVE-2004-0678?

Priority 39/100. Public exploit reference

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References

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