CVE-2025-56515

HIGH 1 PoC
MEDIUM Priority: 0.05 BB Relevance: 78/100
Published: 2025-10-01 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Unchanged
C: High
I: High
A: High

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.

Weakness Classification (2)

Affected Software (1)

VendorProductVersion
suisuijiang fiora 1.0.0

References & Advisories (3)

Proof of Concept (1)

Bug Bounty Relevance

78 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ PoC available (1)

CVSS Score

8.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.52%
Raw Score 0.005160
Percentile 44.5%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00516
2026-11-12
0.00516
2026-11-10
0.00516
2026-11-09
0.00516
2026-11-08
0.00516
2026-11-07
0.00516
2026-11-06
0.00516
2026-11-05
0.00516

Intelligence Sources

nvd ref →