How severe is CVE-2021-22567?

CVE-2021-22567 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2021-22567 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22567?

CVE-2021-22567 affects Dart Dart Software Development Kit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22567?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-22567 published?

CVE-2021-22567 was published on 2022-01-05 and last updated on 2026-06-17.

CVE-2021-22567

CVE-2021-22567 is a medium-severity vulnerability in Dart Dart Software Development Kit with a CVSS 3.x base score of 4.6. 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-284.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
CVSS v2: 3.5
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Dart Dart Software Development Kit
Published: 2022-01-05
Last modified: 2026-06-17

Description

Bidirectional Unicode text can be interpreted and compiled differently than how it appears in editors which can be exploited to get nefarious code passed a code review by appearing benign. An attacker could embed a source that is invisible to a code reviewer that modifies the behavior of a program in unexpected ways.

Frequently asked questions

What is CVE-2021-22567?: Bidirectional Unicode text can be interpreted and compiled differently than how it appears in editors which can be exploited to get nefarious code passed a code review by appearing benign. An attacker could embed a source that is invisible to a code reviewer that modifies the behavior of a program in unexpected ways.
How severe is CVE-2021-22567?: CVE-2021-22567 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2021-22567 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22567?: CVE-2021-22567 affects Dart Dart Software Development Kit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22567?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22567 published?: CVE-2021-22567 was published on 2022-01-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dart:dart_software_development_kit:*:*:*:*:*:*:*:*

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