How severe is CVE-2020-15865?

CVE-2020-15865 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15865 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15865?

CVE-2020-15865 affects Stimulsoft Reports. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15865?

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-2020-15865 published?

CVE-2020-15865 was published on 2020-08-18 and last updated on 2026-06-17.

CVE-2020-15865

CVE-2020-15865 is a critical-severity vulnerability in Stimulsoft Reports with a CVSS 3.x base score of 9.8. 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Stimulsoft Reports
Published: 2020-08-18
Last modified: 2026-06-17

Description

A Remote Code Execution vulnerability in Stimulsoft (aka Stimulsoft Reports) 2013.1.1600.0 allows an attacker to encode C# scripts as base-64 in the report XML file so that they will be compiled and executed on the server that processes this file. This can be used to fully compromise the server.

Frequently asked questions

What is CVE-2020-15865?: A Remote Code Execution vulnerability in Stimulsoft (aka Stimulsoft Reports) 2013.1.1600.0 allows an attacker to encode C# scripts as base-64 in the report XML file so that they will be compiled and executed on the server that processes this file. This can be used to fully compromise the server.
How severe is CVE-2020-15865?: CVE-2020-15865 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15865 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15865?: CVE-2020-15865 affects Stimulsoft Reports. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15865?: 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-2020-15865 published?: CVE-2020-15865 was published on 2020-08-18 and last updated on 2026-06-17.

References

http://burninatorsec.blogspot.com/2018/11/reporting-c-serialization-remote-code.html

Affected products (1)

cpe:2.3:a:stimulsoft:reports:2013.1.1600.0:*:*:*:*:*:*:*

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