How severe is CVE-2021-20745?

CVE-2021-20745 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-20745 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20745?

CVE-2021-20745 affects Inkdrop. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20745?

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-2021-20745 published?

CVE-2021-20745 was published on 2021-06-28 and last updated on 2026-06-17.

CVE-2021-20745

CVE-2021-20745 is a high-severity vulnerability in Inkdrop with a CVSS 3.x base score of 7.8. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Inkdrop
Published: 2021-06-28
Last modified: 2026-06-17

Description

Inkdrop versions prior to v5.3.1 allows an attacker to execute arbitrary OS commands on the system where it runs by loading a file or code snippet containing an invalid iframe into Inkdrop.

Frequently asked questions

What is CVE-2021-20745?: Inkdrop versions prior to v5.3.1 allows an attacker to execute arbitrary OS commands on the system where it runs by loading a file or code snippet containing an invalid iframe into Inkdrop.
How severe is CVE-2021-20745?: CVE-2021-20745 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-20745 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20745?: CVE-2021-20745 affects Inkdrop. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20745?: 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-2021-20745 published?: CVE-2021-20745 was published on 2021-06-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:inkdrop:inkdrop:*:*:*:*:*:*:*:*

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