How severe is CVE-2021-30183?

CVE-2021-30183 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-2021-30183 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30183?

CVE-2021-30183 affects Octopus Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-30183?

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-2021-30183 published?

CVE-2021-30183 was published on 2021-05-14 and last updated on 2026-06-17.

CVE-2021-30183

CVE-2021-30183 is a high-severity vulnerability in Octopus Server 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-312.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-312
Affected product: Octopus Server
Published: 2021-05-14
Last modified: 2026-06-17

Description

Cleartext storage of sensitive information in multiple versions of Octopus Server where in certain situations when running import or export processes, the password used to encrypt and decrypt sensitive values would be written to the logs in plaintext.

Frequently asked questions

What is CVE-2021-30183?: Cleartext storage of sensitive information in multiple versions of Octopus Server where in certain situations when running import or export processes, the password used to encrypt and decrypt sensitive values would be written to the logs in plaintext.
How severe is CVE-2021-30183?: CVE-2021-30183 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-2021-30183 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30183?: CVE-2021-30183 affects Octopus Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-30183?: 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-2021-30183 published?: CVE-2021-30183 was published on 2021-05-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:octopus:server:*:*:*:*:*:*:*:*

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