Deserialization Vulnerability in PHPGurukul Small CRM 4.0 Login Success Handler
CVE-2026-90575

6.3MEDIUM

Key Information:

Vendor

PHPgurukul
Status
Small Crm
Vendor
CVE Published:
13 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90575?

A deserialization vulnerability exists in the PHPGurukul Small CRM 4.0, specifically within the Login Success Handler's function 'unserialize' located in '/crm/login.php'. This flaw allows an attacker to manipulate the 'geopluginURL' argument and potentially execute remote attacks. Although the attack complexity is considered high, the availability of public exploits intensifies the risk for affected installations. It's essential for users of PHPGurukul Small CRM to implement security measures to mitigate this vulnerability.

Affected Version(s)

Small CRM 4.0

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-2026-90575 - Proof of Concept

References

https://vuldb.com/vuln/403160
vdb-entrytechnical-description
https://vuldb.com/vuln/403160/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90575
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

jdexploit (VulDB User)
.