CVE-2026-90575 Details
Description
A weakness has been identified in PHPGurukul Small CRM 4.0. This impacts the function unserialize of the file /crm/login.php of the component Login Success Handler. This manipulation of the argument geopluginURL causes deserialization. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is said to be difficult. The exploit has been made available to the public and could be used for attacks.
A vulnerability allowing insecure deserialization has been identified in PHPGurukul Small CRM version 4.0. The issue arises in the login success handler of the file 'login.php', where the application unserializes data from a third-party geolocation service without proper validation. This vulnerability can be exploited remotely, leading to PHP object injection and potentially arbitrary code execution, depending on the availability of a suitable gadget chain.
To address this vulnerability, update the geolocation service URL to use the HTTPS JSON endpoint and parse the response with 'json_decode()'. If 'unserialize()' must be used, always pass the option to disable class instantiation.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 13, 2026CISA-ADP
Assessed Sep 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/JdExploit/small-crm-login-unserialize | [email protected] | ExploitTechnical Analysis |
| https://phpgurukul.com/ | [email protected] | ProductVendor |
| https://vuldb.com/cve/CVE-2026-90575 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/913188 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/403160 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/403160/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-20 | Improper Input Validation | [email protected] |
| CWE-502 | Deserialization of Untrusted Data | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| PHPGurukul Small CRM | >= 3.0, <= 4.0 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 16, 2026 | CVE Modified | CISA-ADP |
| Sep 13, 2026 | New CVE Received | [email protected] |