How severe is CVE-2021-28791?

CVE-2021-28791 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-2021-28791 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28791?

CVE-2021-28791 affects Swiftformat Project Swiftformat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28791?

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-2021-28791 published?

CVE-2021-28791 was published on 2021-03-18 and last updated on 2026-06-17.

CVE-2021-28791

CVE-2021-28791 is a high-severity vulnerability in Swiftformat Project Swiftformat 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-863.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Swiftformat Project Swiftformat
Published: 2021-03-18
Last modified: 2026-06-17

Description

The unofficial SwiftFormat extension before 1.3.7 for Visual Studio Code allows remote attackers to execute arbitrary code by constructing a malicious workspace with a crafted swiftformat.path configuration value that triggers execution upon opening the workspace.

Frequently asked questions

What is CVE-2021-28791?: The unofficial SwiftFormat extension before 1.3.7 for Visual Studio Code allows remote attackers to execute arbitrary code by constructing a malicious workspace with a crafted swiftformat.path configuration value that triggers execution upon opening the workspace.
How severe is CVE-2021-28791?: CVE-2021-28791 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-2021-28791 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28791?: CVE-2021-28791 affects Swiftformat Project Swiftformat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28791?: 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-2021-28791 published?: CVE-2021-28791 was published on 2021-03-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:swiftformat_project:swiftformat:*:*:*:*:*:visual_studio_code:*:*

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