How severe is CVE-2020-9486?

CVE-2020-9486 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 high, integrity none, and availability none.

Is CVE-2020-9486 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9486?

CVE-2020-9486 affects Apache Nifi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9486?

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-2020-9486 published?

CVE-2020-9486 was published on 2020-10-01 and last updated on 2026-06-17.

CVE-2020-9486

CVE-2020-9486 is a high-severity vulnerability in Apache Nifi 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-532.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-532
Affected product: Apache Nifi
Published: 2020-10-01
Last modified: 2026-06-17

Description

In Apache NiFi 1.10.0 to 1.11.4, the NiFi stateless execution engine produced log output which included sensitive property values. When a flow was triggered, the flow definition configuration JSON was printed, potentially containing sensitive values in plaintext.

Frequently asked questions

What is CVE-2020-9486?: In Apache NiFi 1.10.0 to 1.11.4, the NiFi stateless execution engine produced log output which included sensitive property values. When a flow was triggered, the flow definition configuration JSON was printed, potentially containing sensitive values in plaintext.
How severe is CVE-2020-9486?: CVE-2020-9486 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 high, integrity none, and availability none.
Is CVE-2020-9486 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9486?: CVE-2020-9486 affects Apache Nifi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9486?: 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-2020-9486 published?: CVE-2020-9486 was published on 2020-10-01 and last updated on 2026-06-17.

References

https://nifi.apache.org/security#CVE-2020-9486

Affected products (1)

cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:*

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