Cyber Resilience

CVE-2021-20031

MediumPublic PoC

Published: 12 October 2021

Published
12 October 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS Score 0.3622 97.2th percentile
Risk Priority 34 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-20031 is a medium-severity Open Redirect (CWE-601) vulnerability in Sonicwall Sonicos. Its CVSS base score is 6.1 (Medium).

Operationally, ranked in the top 2.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.

CWE(s)
CWE-601

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

sonicwall
sonicos
≤ 7.0.1-r1262 · ≤ 7.0.1-r1283 · ≤ 7.0.1-r579

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.

AT-2 Literacy Training and Awareness
addresses: CWE-601

Security awareness includes verifying URLs and avoiding untrusted redirects that lead to malicious sites.

SI-10 Information Input Validation
addresses: CWE-601

Validates redirect targets and URLs to ensure they conform to allowed destinations.

References