CVE-2025-57104 identifies a SQL Injection vulnerability in Teampel version 5.1.6, specifically within the /Common/login.aspx endpoint. SQL Injection (SQLi) is a critical web application security flaw that allows an attacker to manipulate backend SQL queries by injecting malicious input through user-controllable parameters. In this case, the login page is vulnerable, which is a high-value target since it often handles authentication credentials and session initialization. Exploiting this vulnerability could allow an attacker to bypass authentication, retrieve sensitive user data, modify or delete database records, or execute administrative operations on the database. The lack of a CVSS score and absence of known exploits in the wild suggest this vulnerability is newly disclosed and may not yet be actively exploited. However, the presence of SQLi in an authentication module is inherently dangerous due to the potential for privilege escalation and data compromise. The vulnerability affects Teampel 5.1.6, but no other versions are specified. No official patches or mitigations have been linked yet, indicating that affected organizations must prioritize risk assessment and implement temporary controls until a fix is available.

For European organizations using Teampel 5.1.6, this vulnerability poses significant risks to confidentiality, integrity, and availability of sensitive data. Successful exploitation could lead to unauthorized access to user accounts, exposure of personal and corporate data, and potential disruption of business operations relying on Teampel. Given the GDPR regulatory environment in Europe, data breaches resulting from this vulnerability could lead to substantial legal and financial penalties. Additionally, if Teampel is integrated into critical infrastructure or business workflows, the integrity of operational data could be compromised, causing cascading effects. The lack of known exploits currently reduces immediate risk, but the vulnerability's nature means attackers could develop exploits rapidly once details are public. Organizations in sectors such as finance, healthcare, and government, which often have stringent security requirements and handle sensitive data, are particularly at risk.

Immediate mitigation steps include: 1) Conducting an inventory to identify all instances of Teampel 5.1.6 in use within the organization. 2) Restricting access to the /Common/login.aspx endpoint through web application firewalls (WAFs) with rules designed to detect and block SQL injection patterns. 3) Implementing input validation and parameterized queries if custom code modifications are possible. 4) Monitoring logs for suspicious activity related to login attempts and SQL errors. 5) Applying network segmentation to limit database access only to trusted application servers. 6) Preparing for patch deployment by establishing communication with the vendor or monitoring for official patches. 7) Educating security teams and developers about the vulnerability to ensure rapid response once patches are released. 8) Considering temporary multi-factor authentication (MFA) enhancements to reduce the impact of potential credential compromise.