How severe is CVE-2021-20670?

CVE-2021-20670 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-2021-20670 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20670?

CVE-2021-20670 affects Weseek Growi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20670?

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-2021-20670 published?

CVE-2021-20670 was published on 2021-03-10 and last updated on 2026-06-17.

CVE-2021-20670

CVE-2021-20670 is a high-severity vulnerability in Weseek Growi 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.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Weseek Growi
Published: 2021-03-10
Last modified: 2026-06-17

Description

Improper access control vulnerability in GROWI versions v4.2.2 and earlier allows a remote unauthenticated attacker to read the user's personal information and/or server's internal information via unspecified vectors.

Frequently asked questions

What is CVE-2021-20670?: Improper access control vulnerability in GROWI versions v4.2.2 and earlier allows a remote unauthenticated attacker to read the user's personal information and/or server's internal information via unspecified vectors.
How severe is CVE-2021-20670?: CVE-2021-20670 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-2021-20670 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20670?: CVE-2021-20670 affects Weseek Growi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20670?: 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-2021-20670 published?: CVE-2021-20670 was published on 2021-03-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:weseek:growi:*:*:*:*:*:*:*:*

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