How severe is CVE-2017-16251?

CVE-2017-16251 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-2017-16251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-16251?

CVE-2017-16251 affects Mitel St14.2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-16251?

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-2017-16251 published?

CVE-2017-16251 was published on 2018-03-13 and last updated on 2026-06-17.

CVE-2017-16251

CVE-2017-16251 is a high-severity vulnerability in Mitel St14.2 with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Mitel St14.2
Published: 2018-03-13
Last modified: 2026-06-17

Description

A vulnerability in the conferencing component of Mitel ST 14.2, release GA28 and earlier, could allow an authenticated user to upload a malicious script to the Personal Library by a crafted POST request. Successful exploit could allow an attacker to execute arbitrary code within the context of the application.

Frequently asked questions

What is CVE-2017-16251?: A vulnerability in the conferencing component of Mitel ST 14.2, release GA28 and earlier, could allow an authenticated user to upload a malicious script to the Personal Library by a crafted POST request. Successful exploit could allow an attacker to execute arbitrary code within the context of the application.
How severe is CVE-2017-16251?: CVE-2017-16251 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-2017-16251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-16251?: CVE-2017-16251 affects Mitel St14.2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-16251?: 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-2017-16251 published?: CVE-2017-16251 was published on 2018-03-13 and last updated on 2026-06-17.

References

https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-18-0004

Affected products (1)

cpe:2.3:a:mitel:st14.2:*:*:*:*:*:*:*:*

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