How severe is CVE-2020-24594?

CVE-2020-24594 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-24594 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-24594?

CVE-2020-24594 primarily affects Mitel Micloud Management Portal. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-24594?

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

When was CVE-2020-24594 published?

CVE-2020-24594 was published on 2020-09-25 and last updated on 2026-06-17.

CVE-2020-24594

CVE-2020-24594 is a critical-severity vulnerability in Mitel Micloud Management Portal with a CVSS 3.x base score of 9.6. 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-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
CVSS v2: 6.8
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mitel Micloud Management Portal
Published: 2020-09-25
Last modified: 2026-06-17

Description

Mitel MiCloud Management Portal before 6.1 SP5 could allow an unauthenticated attacker to execute arbitrary scripts due to insufficient input validation, aka XSS. A successful exploit could allow an attacker to gain access to a user session.

Frequently asked questions

What is CVE-2020-24594?: Mitel MiCloud Management Portal before 6.1 SP5 could allow an unauthenticated attacker to execute arbitrary scripts due to insufficient input validation, aka XSS. A successful exploit could allow an attacker to gain access to a user session.
How severe is CVE-2020-24594?: CVE-2020-24594 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-24594 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-24594?: CVE-2020-24594 primarily affects Mitel Micloud Management Portal. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-24594?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-24594 published?: CVE-2020-24594 was published on 2020-09-25 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:mitel:micloud_management_portal:*:*:*:*:*:*:*:*
cpe:2.3:a:mitel:micloud_management_portal:6.1:-:*:*:*:*:*:*
cpe:2.3:a:mitel:micloud_management_portal:6.1:sp4:*:*:*:*:*:*

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