CVE-2025-8307 is a vulnerability classified under CWE-257, indicating that passwords are stored in a recoverable format rather than being securely hashed. Asseco InfoMedica Plus, a healthcare software suite used for managing both administrative and medical tasks, stores user passwords in an encoded form within its database. However, this encoding is reversible because the decoding algorithm is embedded within the client-side component of the software. This design flaw allows an attacker who gains access to the encoded password data to decode and retrieve the original plaintext passwords. The vulnerability affects versions 4.0.0 and 5.0.0 of the product and was addressed in later releases 4.50.1 and 5.38.0. The CVSS 4.0 base score is 5.9 (medium severity), with an attack vector of local (AV:L), high attack complexity (AC:H), and no privileges or user interaction required. The vulnerability impacts confidentiality (VC:H) but not integrity or availability. No known exploits have been reported in the wild. The flaw poses a significant risk in environments where attackers can access the database or backup files containing encoded passwords, potentially leading to credential theft and unauthorized system access. The presence of the decoding algorithm on the client side further facilitates password recovery once encoded passwords are obtained.

For European healthcare organizations using Asseco InfoMedica Plus versions 4.0.0 or 5.0.0, this vulnerability could lead to unauthorized disclosure of user credentials. Compromise of passwords may enable attackers to access sensitive patient data, alter administrative records, or disrupt healthcare operations. Given the sensitive nature of healthcare data, breaches could result in violations of GDPR and other data protection regulations, leading to legal and financial penalties. The impact is heightened in environments where database access controls are weak or where backups are insufficiently protected. Although exploitation requires local access to encoded passwords, insider threats or attackers who gain initial footholds could leverage this vulnerability to escalate privileges or move laterally within healthcare networks. The medium severity rating reflects the balance between the difficulty of exploitation and the sensitivity of the data at risk. Overall, this vulnerability undermines trust in the confidentiality of healthcare information systems and could have serious operational and reputational consequences for affected organizations.

1. Upgrade Asseco InfoMedica Plus to versions 4.50.1 or 5.38.0 or later, where the vulnerability has been fixed. 2. Restrict access to databases and backup files containing encoded passwords using strict access control policies and network segmentation. 3. Implement monitoring and auditing of database access to detect unauthorized attempts to retrieve encoded passwords. 4. Educate staff about the risks of insider threats and enforce the principle of least privilege for database and system access. 5. Consider additional encryption or tokenization of sensitive data at rest to reduce exposure in case of database compromise. 6. Review and enhance incident response plans to quickly address potential credential compromise scenarios. 7. If upgrading immediately is not feasible, isolate affected systems from untrusted networks and limit client-side software distribution to trusted users only. 8. Regularly verify that no encoded password dumps or backups have been leaked or exposed externally.