SQL Injection Vulnerability in LayerBB Forum Software
CVE-2021-47954

8.8HIGH

Key Information:

Vendor

Layerbb

Status
Layerbb
Vendor
CVE Published:
16 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47954?

LayerBB 1.1.4 features an SQL injection flaw that enables unauthenticated attackers to alter SQL queries through the 'search_query' parameter. By exploiting this vulnerability, attackers can send specially crafted POST requests to /search.php, utilizing CASE WHEN statements to gain access to sensitive information stored in the database. This can lead to unauthorized data exposure and significant security risks for affected systems.

Affected Version(s)

LayerBB 1.1.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47954 - Proof of Concept

References

https://www.exploit-db.com/exploits/49593
exploit
https://www.vulncheck.com/advisories/layerbb-sql-injectio...
third-party-advisory

CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Görkem Haşin
.