CVE-2009-4493: Orion Application Server 2.0.7 writes data to a log file without sanitizing non-printable characters, which mi

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MEDIUM 5.0DOWNGRADE

CVE-2009-4493 is a medium-severity flaw (CVSS 5.0) affecting orion application server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Orion Application Server 2.0.7 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

Why this priority

EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	7.0% (top 6%)
CISA exploited list	No
Weakness	CWE-20
Published	2010-01-13
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: orion

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

Am I affected?

Timeline

2010-01-13 20:30 UTCPublished CVE record published
2026-06-16 23:13 UTCUpdated Record last modified

orion orion application server DOWNGRADE

Affected: 2.0.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.7

1. Check installed version

apt-cache policy orion-application-server || rpm -q orion-application-server || orion-application-server --version

2. No fixed release: DOWNGRADE to a release before 2.0.7 (Debian / Ubuntu)

apt-cache madison orion-application-server sudo apt install orion-application-server=<VERSION_BEFORE_2.0.7> sudo apt-mark hold orion-application-server

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

dnf --showduplicates list orion-application-server sudo dnf downgrade orion-application-server-<VERSION_BEFORE_2.0.7> sudo dnf versionlock add orion-application-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: Orion Application Server 2.0.7 - 'Terminal Escape Sequence in Logs' Command Injection

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-2009-4493?

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

Is CVE-2009-4493 being exploited?

CVE-2009-4493 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-2009-4493 affect?

CVE-2009-4493 affects orion application server. Severity is medium (CVSS 5.0). Orion Application Server 2.0.7 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP requ

How urgent is CVE-2009-4493?

Priority 46/100. EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2006-0816 MEDIUM 5.0 UPGRADE Orion Application Server before 2.0.7, when running on Windows, allows remote attackers to obtain the source c
CVE-2005-2981 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in Orion 1.3.8 and 1.4.5 allows remote attackers to inject arbitrary
CVE-2002-1859 MEDIUM 5.0 DOWNGRADE Orion Application Server 1.5.3, when running on Windows, allows remote attackers to retrieve files in the WEB-

References

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