CVE-2021-43929
Published: 07 February 2022
Summary
CVE-2021-43929 is a medium-severity Injection (CWE-74) vulnerability in Synology Diskstation Manager. Its CVSS base score is 6.5 (Medium).
Operationally, ranked at the 43.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-30791
Vulnerability details
Improper neutralization of special elements in output used by a downstream component ('Injection') vulnerability in work flow management in Synology DiskStation Manager (DSM) before 7.0.1-42218-2 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Developer assessments and testing (including injection-focused techniques) identify improper neutralization of special elements, and the verifiable flaw remediation corrects them pre-deployment.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.
Identifies indicators of injection attacks (command, SQL, LDAP, etc.) via anomaly and attack monitoring.