How severe is CVE-2020-25609?

CVE-2020-25609 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-25609 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25609?

CVE-2020-25609 affects Mitel Micollab. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-25609?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-25609 published?

CVE-2020-25609 was published on 2020-12-18 and last updated on 2026-06-17.

CVE-2020-25609

CVE-2020-25609 is a medium-severity vulnerability in Mitel Micollab with a CVSS 3.x base score of 5.4. 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: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mitel Micollab
Published: 2020-12-18
Last modified: 2026-06-17

Description

The NuPoint Messenger Portal of Mitel MiCollab before 9.2 could allow an authenticated attacker to execute arbitrary scripts due to insufficient input validation, aka XSS. A successful exploit could allow an attacker to view and modify user data.

Frequently asked questions

What is CVE-2020-25609?: The NuPoint Messenger Portal of Mitel MiCollab before 9.2 could allow an authenticated attacker to execute arbitrary scripts due to insufficient input validation, aka XSS. A successful exploit could allow an attacker to view and modify user data.
How severe is CVE-2020-25609?: CVE-2020-25609 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-25609 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25609?: CVE-2020-25609 affects Mitel Micollab. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-25609?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-25609 published?: CVE-2020-25609 was published on 2020-12-18 and last updated on 2026-06-17.

References

https://www.mitel.com/support/security-advisories

Affected products (1)

cpe:2.3:a:mitel:micollab:*:*:*:*:*:-:*:*

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