CVE-2025-6846 is a critical SQL Injection vulnerability identified in code-projects Simple Forum version 1.0, specifically within the /forum_viewfile.php file. The vulnerability arises from improper sanitization and validation of the 'Name' parameter, which an attacker can manipulate to inject malicious SQL code. This flaw allows remote attackers to execute arbitrary SQL queries on the backend database without requiring any authentication or user interaction. The vulnerability is exploitable over the network (AV:N), requires no privileges (PR:N), no user interaction (UI:N), and has low complexity (AC:L). The impact on confidentiality, integrity, and availability is limited but present (VC:L, VI:L, VA:L), indicating partial compromise potential. The vulnerability has been publicly disclosed, but no known exploits are currently observed in the wild. The CVSS v4.0 score is 6.9, categorizing it as medium severity, reflecting the balance between ease of exploitation and limited impact scope. The lack of available patches or mitigations from the vendor increases the risk for unpatched systems. SQL Injection vulnerabilities can lead to unauthorized data access, data modification, or even full database compromise depending on the backend database privileges and configuration. Given that Simple Forum is a web-based forum software, exploitation could lead to leakage of user data, forum content manipulation, or disruption of forum services.

For European organizations using code-projects Simple Forum 1.0, this vulnerability poses a significant risk to the confidentiality and integrity of forum data. Attackers could extract sensitive user information, including personal data protected under GDPR, leading to regulatory penalties and reputational damage. Integrity violations could allow attackers to alter forum content, potentially spreading misinformation or malicious links. Availability impacts, while limited, could disrupt community engagement platforms critical for internal or external communications. Since the vulnerability requires no authentication and can be exploited remotely, attackers can target vulnerable forums without prior access, increasing the attack surface. Organizations relying on Simple Forum for customer support, community interaction, or internal collaboration may face operational disruptions and data breaches. The public disclosure without available patches means European entities must act swiftly to mitigate risks. Furthermore, exploitation could be leveraged as a foothold for broader network intrusion if the forum server is connected to internal systems.

1. Immediate mitigation should involve disabling or restricting access to the vulnerable /forum_viewfile.php endpoint, especially the 'Name' parameter, through web application firewalls (WAF) or reverse proxies with SQL Injection detection rules. 2. Implement strict input validation and sanitization on all user-supplied parameters, particularly the 'Name' argument, using parameterized queries or prepared statements to prevent injection. 3. If possible, upgrade to a patched version of Simple Forum once available or consider migrating to alternative forum software with active security support. 4. Conduct thorough security audits and penetration testing on the forum application to identify and remediate other potential injection points. 5. Monitor web server and database logs for suspicious queries or access patterns indicative of exploitation attempts. 6. Employ network segmentation to isolate the forum server from sensitive internal systems to limit lateral movement in case of compromise. 7. Educate administrators on the risks of SQL Injection and ensure timely application of security updates. 8. As a temporary workaround, consider implementing strict allowlists for acceptable 'Name' parameter values if feasible.