CVE-2025-56515
File upload vulnerability in Fiora chat application 1.0.0 through user avatar upload functionality.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.52% probability · 42th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79, CWE-434
- Affected
- suisuijiang/fiora
- Source
- cve@mitre.org
References
- https://fiora.suisuijiang.com/Product
- https://github.com/Kov404/CVE-2025-56515/tree/mainExploit, Third Party Advisory
- https://github.com/yinxin630/fioraProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.