CVE-2021-22567

Name: CVE-2021-22567
Creator: NVD / NIST
Published: 2022-01-05T11:15:08.12+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.5/10EPSS 0.60%

Last modified Jun 17, 2026

CVE-2021-22567 is a low-severity vulnerability rated 3.5/10 on the CVSS scale. 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.. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

3.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

EPSS Probability

0.60%

44.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Dart	Dart Software Development Kit	< 2.15.0

References

https://github.com/dart-lang/sdk/blob/main/CHANGELOG.mdRelease Notes, Third Party Advisory
https://github.com/dart-lang/sdk/commit/52519ea8eb4780c468c4c2ed00e7c8046ccfed41Patch, Third Party Advisory
https://github.com/dart-lang/sdk/blob/main/CHANGELOG.mdRelease Notes, Third Party Advisory
https://github.com/dart-lang/sdk/commit/52519ea8eb4780c468c4c2ed00e7c8046ccfed41Patch, Third Party Advisory

Timeline

Published: Jan 5, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22567?

How severe is CVE-2021-22567?

CVE-2021-22567 has a CVSS score of 3.5/10 (LOW severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22567?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22567?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST