How severe is CVE-2018-11139?

CVE-2018-11139 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-11139 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 42% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11139?

CVE-2018-11139 affects Quest Kace System Management Appliance. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11139?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-11139 published?

CVE-2018-11139 was published on 2018-05-31 and last updated on 2026-06-17.

CVE-2018-11139

CVE-2018-11139 is a high-severity vulnerability in Quest Kace System Management Appliance with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 42% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 42% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Quest Kace System Management Appliance
Published: 2018-05-31
Last modified: 2026-06-17

Description

The '/common/ajax_email_connection_test.php' script in the Quest KACE System Management Appliance 8.0.318 is accessible by any authenticated user and can be abused to execute arbitrary commands on the system. This script is vulnerable to command injection via the unsanitized user input 'TEST_SERVER' sent to the script via the POST method.

Frequently asked questions

What is CVE-2018-11139?: The '/common/ajax_email_connection_test.php' script in the Quest KACE System Management Appliance 8.0.318 is accessible by any authenticated user and can be abused to execute arbitrary commands on the system. This script is vulnerable to command injection via the unsanitized user input 'TEST_SERVER' sent to the script via the POST method.
How severe is CVE-2018-11139?: CVE-2018-11139 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-11139 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 42% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11139?: CVE-2018-11139 affects Quest Kace System Management Appliance. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11139?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-11139 published?: CVE-2018-11139 was published on 2018-05-31 and last updated on 2026-06-17.

References

https://www.coresecurity.com/advisories/quest-kace-system-management-appliance-multiple-vulnerabilities

Affected products (1)

cpe:2.3:a:quest:kace_system_management_appliance:8.0.318:*:*:*:*:*:*:*

More vulnerabilities in Quest Kace System Management Appliance

CVE-2018-11141 — Critical (CVSS 9.8): The 'IMAGES_JSON' and 'attachments_to_remove[]' parameters of the '/adminui/advisory.php' script in the Quest KACE…
CVE-2018-11140 — Critical (CVSS 9.8): The 'reportID' parameter received by the '/common/run_report.php' script in the Quest KACE System Management Appliance…
CVE-2018-11138 — Critical (CVSS 9.8): The '/common/download_agent_installer.php' script in the Quest KACE System Management Appliance 8.0.318 is accessible…
CVE-2018-11136 — Critical (CVSS 9.8): The 'orgID' parameter received by the '/common/download_agent_installer.php' script in the Quest KACE System Management…
CVE-2018-11135 — High (CVSS 8.8): The script '/adminui/error_details.php' in the Quest KACE System Management Appliance 8.0.318 allows authenticated…
CVE-2018-11134 — High (CVSS 8.8): In order to perform actions that requires higher privileges, the Quest KACE System Management Appliance 8.0.318 relies…

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