Cyber Resilience

CVE-2021-47954

HighPublic PoC

Published: 16 May 2026

Published
16 May 2026
Modified
18 May 2026
KEV Added
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Patch
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CVSS Score v4 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0024 14.7th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2021-47954 is a high-severity SQL Injection (CWE-89) vulnerability. Its CVSS base score is 8.8 (High).

Operationally, ranked at the 14.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

LayerBB 1.1.4 contains an SQL injection vulnerability that allows unauthenticated attackers to manipulate database queries by injecting SQL code through the search_query parameter. Attackers can send POST requests to /search.php with malicious search_query values using CASE WHEN statements to extract…

more

sensitive database information.

CWE(s)
CWE-89

Related Threats

CVEs Like This One

CVE-2026-26709Shared CWE-89
CVE-2026-24956Shared CWE-89
CVE-2021-47980Shared CWE-89
CVE-2018-25199Shared CWE-89
CVE-2026-27179Shared CWE-89
CVE-2026-33615Shared CWE-89
CVE-2025-0308Shared CWE-89
CVE-2025-28939Shared CWE-89
CVE-2019-25581Shared CWE-89
CVE-2026-27885Shared CWE-89

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.

CA-8 Penetration Testing
addresses: CWE-89

Penetration testing uses SQL injection payloads against database interfaces, identifying and supporting fixes for SQL injection weaknesses.

SI-10 Information Input Validation
addresses: CWE-89

Validates query inputs to prevent SQL syntax or command manipulation.

References