How severe is CVE-2020-15899?

CVE-2020-15899 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-15899 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15899?

CVE-2020-15899 affects Grin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15899?

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

When was CVE-2020-15899 published?

CVE-2020-15899 was published on 2020-07-28 and last updated on 2026-06-17.

CVE-2020-15899

CVE-2020-15899 is a high-severity vulnerability in Grin with a CVSS 3.x base score of 7.5. 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-345.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Grin
Published: 2020-07-28
Last modified: 2026-06-17

Description

Grin 3.0.0 before 4.0.0 has insufficient validation of data related to Mimblewimble.

Frequently asked questions

What is CVE-2020-15899?: Grin 3.0.0 before 4.0.0 has insufficient validation of data related to Mimblewimble.
How severe is CVE-2020-15899?: CVE-2020-15899 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-15899 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15899?: CVE-2020-15899 affects Grin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15899?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-15899 published?: CVE-2020-15899 was published on 2020-07-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:grin:grin:*:*:*:*:*:*:*:*

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CVE-2019-9195 — Critical (CVSS 9.8): util/src/zip.rs in Grin before 1.0.2 mishandles suspicious files. An attacker can execute arbitrary code via directory…
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CVE-2020-12439 — Medium (CVSS 5.3): Grin before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.

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