{"cve":"CVE-2025-56515","nvd":{"published":"2025-10-01T16:15:53.217","modified":"2026-06-17T09:42:38.747","status":"Analyzed","description":"File upload vulnerability in Fiora chat application 1.0.0 through user avatar upload functionality. The application fails to validate SVG file content, allowing malicious SVG files with embedded foreignObject elements containing iframe tags and JavaScript event handlers (onmouseover) to be uploaded and stored. When rendered, these SVG files execute arbitrary JavaScript, enabling attackers to steal user sessions, cookies, and perform unauthorized actions in the context of users viewing affected profiles.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-79","CWE-434"],"references":["https://fiora.suisuijiang.com/","https://github.com/Kov404/CVE-2025-56515/tree/main","https://github.com/yinxin630/fiora"],"products":["suisuijiang:fiora"],"source":"nvd","synced_at":"2026-10-19T22:11:26.888974865+00:00"},"epss":{"cve":"CVE-2025-56515","score":0.00516,"percentile":0.43953,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2c6j-vw6r-mfch","url":"https://osv.dev/vulnerability/GHSA-2c6j-vw6r-mfch","summary":"Fiora chat group avatar is vulnerable to XSS via SVG files","modified":"2025-10-01T21:12:33.510329Z","packages":[{"ecosystem":"npm","name":"fiora","purl":"pkg:npm/fiora","ranges":["1.0.0"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}