Vulnerability Details CVE-2025-15265
An SSR XSS exists in async hydration when attacker‑controlled keys are passed to hydratable. The key is embedded inside a <script> block without HTML‑safe escaping, allowing </script> to terminate the script and inject arbitrary JavaScript. This enables remote script execution in users' browsers, with potential for session theft and account compromise.
This issue affects Svelte: from 5.46.0 before 5.46.3.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 28.5%
CVSS Severity
CVSS v3 Score 6.1
References