Authenticated SQL Injection in ISPConfig Remote API
CVE-2026-61518

8.7HIGH

Key Information:

Vendor

Ispconfig

Status
Ispconfig3
Vendor
CVE Published:
19 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-61518?

The ISPConfig Remote API is susceptible to an authenticated SQL injection vulnerability stemming from improper handling of the primary_id parameter in SQL queries. This flaw allows users with low-privilege permissions to manipulate SQL queries directly, enabling the injection of malicious payloads without using standard protection mechanisms such as parameterized queries or input validation. As a result, attackers can potentially delete or alter records in the control panel database and extract sensitive information, including password hashes and client data, through advanced methods like blind boolean inference.

Affected Version(s)

ispconfig3 3.2.0

ispconfig3 3.2.0

ispconfig3 3.3.0

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-2026-61518 - Proof of Concept

References

https://github.com/geo-chen/oss/blob/main/ispconfig3.md
technical-descriptionexploit
https://www.vulncheck.com/advisories/ispconfig-authentica...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
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

George Chen
.