The DefterAsist Financial Advisor Platform contains a stored cross‑site scripting vulnerability. Improper neutralization of user input during web page generation allows malicious scripts to be persisted in the application. An attacker who can insert such scripts can execute arbitrary JavaScript in the browsers of any user who views the affected pages, potentially exposing sensitive data, hijacking sessions, or defacing the interface. The weakness is identified as CWE‑79 and is rated with a CVSS base score of 5.4, indicating moderate severity.

Affecting Fazile BACAK’s DefterAsist Financial Advisor Platform through the date 2026‑10‑27. Versions of the platform released before or on that date are susceptible; newer releases are assumed to have incorporated a mitigation.

With a CVSS score of 5.4 and no EPSS data available, the exploit probability is uncertain but the potential impact on confidentiality, integrity, and availability warrants attention. The vulnerability can be exploited by any attacker who can supply or inject input that is then rendered in the web interface. Given that stored XSS provides a persistent code execution vector, it is recommended to treat this as a moderate‑to‑high risk in the context of the platform’s user base. The issue is not listed in the CISA KEV catalog, suggesting no known widespread exploitation at present. The likely attack vector is through malicious user‑generated content that is stored and later displayed to other users or administrators without proper sanitization.