CVE-2025-56515

Name: CVE-2025-56515
Creator: NVD / NIST
Published: 2025-10-01T16:15:53.217+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.49%

Last modified Jun 17, 2026

CVE-2025-56515 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.49%

38.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Suisuijiang	Fiora	1.0.0

References

https://fiora.suisuijiang.com/Product
https://github.com/Kov404/CVE-2025-56515/tree/mainExploit, Third Party Advisory
https://github.com/yinxin630/fioraProduct

Timeline

Published: Oct 1, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-56515?

How severe is CVE-2025-56515?

CVE-2025-56515 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.

How do I fix CVE-2025-56515?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-56515?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST