CVE-2007-3364: Cross-site scripting (XSS) vulnerability in the cgi-bin/post.mscgi sample page in MyServer 0.8.9 allows remote

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MEDIUM 4.3DOWNGRADE

CVE-2007-3364 is a medium-severity flaw (CVSS 4.3) affecting myserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in the cgi-bin/post.mscgi sample page in MyServer 0.8.9 allows remote attackers to inject arbitrary web script or HTML via the body content.

Why this priority

EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	4.2% (top 9%)
CISA exploited list	No
Published	2007-06-22
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: myserver

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

Am I affected?

Timeline

2007-06-22 18:30 UTCPublished CVE record published
2026-06-16 22:41 UTCUpdated Record last modified

myserver myserver DOWNGRADE

Affected: 0.8.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.8.9 (Debian / Ubuntu)

apt-cache madison myserver sudo apt install myserver=<VERSION_BEFORE_0.8.9> sudo apt-mark hold myserver

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

dnf --showduplicates list myserver sudo dnf downgrade myserver-<VERSION_BEFORE_0.8.9> sudo dnf versionlock add myserver

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: MyServer 0.9.8 - Post.MSCGI 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-2007-3364?

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

Is CVE-2007-3364 being exploited?

CVE-2007-3364 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-2007-3364 affect?

CVE-2007-3364 affects myserver. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in the cgi-bin/post.mscgi sample page in MyServer 0.8.9 allows remote attackers to inject arbitrary web script or HTML via the body content.

How urgent is CVE-2007-3364?

Priority 43/100. EPSS top 9%: very likely to be exploited; Public exploit reference

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CVE-2007-1588 HIGH 7.5 DOWNGRADE server.cpp in MyServer 0.8.5 calls Process::setuid before calling Process::setgid and thus does not properly d
CVE-2005-1658 MEDIUM 5.0 DOWNGRADE Directory traversal vulnerability in filemanager.cpp in MyServer 0.8 allows remote attackers to list the paren

References

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