How severe is CVE-2020-0656?

CVE-2020-0656 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-2020-0656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-0656?

CVE-2020-0656 affects Microsoft Dynamics 365. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-0656?

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

When was CVE-2020-0656 published?

CVE-2020-0656 was published on 2020-01-14 and last updated on 2026-06-17.

CVE-2020-0656

CVE-2020-0656 is a medium-severity vulnerability in Microsoft Dynamics 365 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% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Microsoft Dynamics 365
Published: 2020-01-14
Last modified: 2026-06-17

Description

A cross site scripting vulnerability exists when Microsoft Dynamics 365 (on-premises) does not properly sanitize a specially crafted web request to an affected Dynamics server, aka 'Microsoft Dynamics 365 (On-Premise) Cross Site Scripting Vulnerability'.

Frequently asked questions

What is CVE-2020-0656?: A cross site scripting vulnerability exists when Microsoft Dynamics 365 (on-premises) does not properly sanitize a specially crafted web request to an affected Dynamics server, aka 'Microsoft Dynamics 365 (On-Premise) Cross Site Scripting Vulnerability'.
How severe is CVE-2020-0656?: CVE-2020-0656 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-2020-0656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-0656?: CVE-2020-0656 affects Microsoft Dynamics 365. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-0656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-0656 published?: CVE-2020-0656 was published on 2020-01-14 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0656

Affected products (1)

cpe:2.3:a:microsoft:dynamics_365:7.0:*:*:*:*:*:*:*

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