CVE-2006-6158: Multiple cross-site scripting (XSS) vulnerabilities in (a) PMOS Help Desk 2.4, formerly (b) InverseFlow Help D

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MEDIUM 6.8DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2006-6158 is a medium-severity flaw (CVSS 6.8) affecting ace helpdesk, help desk, pmos helpdesk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in (a) PMOS Help Desk 2.4, formerly (b) InverseFlow Help Desk 2.31 and also sold as (c) Ace Helpdesk 2.31, allow remote attackers to inject arbitrary web script or HTML via the (1) id or email parameter to ticketview.php, or (2) the email parameter to ticket.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	3.0% (top 12%)
CISA exploited list	No
Published	2006-11-28
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ace helpdesk · inverseflow · pmos helpdesk

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

Am I affected?

Timeline

2006-11-28 23:28 UTCPublished CVE record published
2026-06-16 22:32 UTCUpdated Record last modified

ace helpdesk ace helpdesk DOWNGRADE

Affected: 2.3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.1

1. Check installed version

apt-cache policy ace-helpdesk || rpm -q ace-helpdesk || ace-helpdesk --version

2. No fixed release: DOWNGRADE to a release before 2.3.1 (Debian / Ubuntu)

apt-cache madison ace-helpdesk sudo apt install ace-helpdesk=<VERSION_BEFORE_2.3.1> sudo apt-mark hold ace-helpdesk

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

dnf --showduplicates list ace-helpdesk sudo dnf downgrade ace-helpdesk-<VERSION_BEFORE_2.3.1> sudo dnf versionlock add ace-helpdesk

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.

inverseflow help desk DOWNGRADE

Affected: 2.31

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.31

1. Check installed version

apt-cache policy help-desk || rpm -q help-desk || help-desk --version

2. No fixed release: DOWNGRADE to a release before 2.31 (Debian / Ubuntu)

apt-cache madison help-desk sudo apt install help-desk=<VERSION_BEFORE_2.31> sudo apt-mark hold help-desk

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

dnf --showduplicates list help-desk sudo dnf downgrade help-desk-<VERSION_BEFORE_2.31> sudo dnf versionlock add help-desk

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.

pmos helpdesk pmos helpdesk DOWNGRADE

Affected: 2.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4

1. Check installed version

apt-cache policy pmos-helpdesk || rpm -q pmos-helpdesk || pmos-helpdesk --version

2. No fixed release: DOWNGRADE to a release before 2.4 (Debian / Ubuntu)

apt-cache madison pmos-helpdesk sudo apt install pmos-helpdesk=<VERSION_BEFORE_2.4> sudo apt-mark hold pmos-helpdesk

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

dnf --showduplicates list pmos-helpdesk sudo dnf downgrade pmos-helpdesk-<VERSION_BEFORE_2.4> sudo dnf versionlock add pmos-helpdesk

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: PMOS Help Desk 2.3 - 'ticket.php?email' Cross-Site Scripting
Exploit-DB: PMOS Help Desk 2.3 - 'ticketview.php' Multiple Cross-Site Scripting Vulnerabilities

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-2006-6158?

ace helpdesk: downgrade or apply the listed mitigation; help desk: downgrade or apply the listed mitigation; pmos helpdesk: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-6158 being exploited?

CVE-2006-6158 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-2006-6158 affect?

CVE-2006-6158 affects ace helpdesk, help desk, pmos helpdesk. Severity is medium (CVSS 6.8). Multiple cross-site scripting (XSS) vulnerabilities in (a) PMOS Help Desk 2.4, formerly (b) InverseFlow Help Desk 2.31 and also sold as (c) Ace Helpdesk 2.31, allow remote attackers to inject arbitrary web script or HTML via the (1) id or e

How urgent is CVE-2006-6158?

Priority 51/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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