LOW
CVE-2021-22567
CWE-284Published: January 5, 2022· Updated: Jun 17, 2026
3.5
CVSS v3.1
Official 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.
Technical Analysis
CVE-2021-22567 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Affected Vendors & Products
dart1 product(s)
dart software development kit
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (4)
→
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
Quick Facts
CVE IDCVE-2021-22567
CVSS Score3.5 / 10
SeverityLOW
WeaknessCWE-284
CISA KEVNo
Affected1 vendor(s)
PublishedJan 5, 2022
Related CVEs (CWE-284)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-22567 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.