CVE-2021-47954Public exploitNetwork attack vector

Unauthenticated database extraction via search_query injection

Published May 16, 2026 · Updated May 16, 2026

SQL injection in LayerBB 1.1.4 allows remote attackers to extract sensitive database data through a crafted search_query POST parameter. The /search.php search handler accepts injected CASE WHEN expressions in search_query, causing attacker-controlled SQL to alter the database query. The endpoint requires no authentication or user interaction, and the demonstrated conditional payload exposes database contents.

CVSS severity8.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in LayerBB 1.1.4 allows remote attackers to extract sensitive database data through a crafted search_query POST parameter. The /search.php search handler accepts injected CASE WHEN expressions in search_query, causing attacker-controlled SQL to alter the database query. The endpoint requires no authentication or user interaction, and the demonstrated conditional payload exposes database contents.

The record

CVE
CVE-2021-47954
Published
May 16, 2026
Updated
May 16, 2026
Vendor
LayerBB
Product
LayerBB
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2026CVE publishedPublication date reported by the CVE source.
  2. May 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LayerBB · LayerBBversion=1.1.4

Published CVSS scores

8.2VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
8.8VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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