CVE-2025-7155 is a critical vulnerability identified in version 1.0 of the PHPGurukul Online Notes Sharing System, specifically within the /Dashboard component's Cookie Handler. The vulnerability arises from improper sanitization of the 'sessionid' argument, which allows an attacker to perform SQL Injection attacks remotely without requiring authentication or user interaction. Although the original researcher suspected an XPath Injection, the attack payloads are consistent with SQL Injection techniques. This vulnerability enables an attacker to manipulate backend SQL queries by injecting malicious input through the sessionid parameter, potentially leading to unauthorized data access, data modification, or even full compromise of the underlying database. The CVSS 4.0 score is 6.9 (medium severity), reflecting the network attack vector, low attack complexity, no privileges or user interaction required, and limited impact on confidentiality, integrity, and availability. However, the exploit has been publicly disclosed, increasing the risk of exploitation. No official patches or mitigations have been published yet, and no known exploits are currently observed in the wild. The vulnerability affects only version 1.0 of the product, which is a niche online notes sharing platform developed by PHPGurukul.

For European organizations using PHPGurukul Online Notes Sharing System 1.0, this vulnerability poses a significant risk of unauthorized access to sensitive notes and user data stored within the system. Exploitation could lead to data breaches, loss of intellectual property, and compromise of user privacy. Given the remote, unauthenticated nature of the attack, threat actors could leverage this vulnerability to infiltrate internal networks or pivot to other systems. The impact extends to regulatory compliance concerns under GDPR, as unauthorized data exposure could result in legal penalties and reputational damage. Organizations relying on this software for collaborative note sharing or educational purposes may face operational disruptions if attackers manipulate or delete critical data. Although the product appears to have limited market penetration, any European entity using it in sensitive environments should consider the risk substantial due to the ease of exploitation and potential data confidentiality breaches.

Since no official patches are currently available, European organizations should immediately implement compensating controls. These include disabling or restricting access to the vulnerable /Dashboard Cookie Handler component, especially the sessionid parameter, through web application firewalls (WAF) with custom rules to detect and block SQL injection patterns. Input validation and sanitization should be enforced at the application level if source code access is available, employing parameterized queries or prepared statements to eliminate injection vectors. Network segmentation can limit exposure by isolating the notes sharing system from critical infrastructure. Monitoring and logging of unusual database queries and sessionid parameter usage should be enhanced to detect potential exploitation attempts. Organizations should also consider migrating to alternative, actively maintained note-sharing platforms with robust security postures. Finally, maintaining up-to-date backups will aid recovery in case of data tampering or loss.