Cyber Resilience

CVE-2021-42637

CriticalPublic PoC

Published: 02 February 2022

Published
02 February 2022
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0146 81.3th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-42637 is a critical-severity SSRF (CWE-918) vulnerability in Printerlogic Web Stack. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 18.7% 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

PrinterLogic Web Stack versions 19.1.1.13 SP9 and below use user-controlled input to craft a URL, resulting in a Server Side Request Forgery (SSRF) vulnerability.

CWE(s)
CWE-918

Related Threats

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

Affected Assets

printerlogic
web stack
19.1.1.13 · ≤ 19.1.1.13

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.

CA-8 Penetration Testing
addresses: CWE-918

Penetration testing attempts server-side requests to internal resources, identifying SSRF weaknesses for remediation.

SC-7 Boundary Protection
addresses: CWE-918

Outbound connections to external resources can be monitored and limited at the boundary, reducing SSRF impact.

SI-10 Information Input Validation
addresses: CWE-918

Validates server-side URLs and resource references to block SSRF attempts.

SI-4 System Monitoring
addresses: CWE-918

Detects server-side request forgery through monitoring of unexpected outbound connections.

References