How severe is CVE-2020-27340?

CVE-2020-27340 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2020-27340 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27340?

CVE-2020-27340 affects Mitel Micollab. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27340?

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

When was CVE-2020-27340 published?

CVE-2020-27340 was published on 2020-12-18 and last updated on 2026-06-17.

CVE-2020-27340

CVE-2020-27340 is a medium-severity vulnerability in Mitel Micollab with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mitel Micollab
Published: 2020-12-18
Last modified: 2026-06-17

Description

The online help portal of Mitel MiCollab before 9.2 could allow an attacker to redirect a user to an unauthorized website by executing malicious script due to insufficient access control.

Frequently asked questions

What is CVE-2020-27340?: The online help portal of Mitel MiCollab before 9.2 could allow an attacker to redirect a user to an unauthorized website by executing malicious script due to insufficient access control.
How severe is CVE-2020-27340?: CVE-2020-27340 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2020-27340 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27340?: CVE-2020-27340 affects Mitel Micollab. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27340?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-27340 published?: CVE-2020-27340 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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