# CVE-2025-56515: Fiora chat group avatar is vulnerable to XSS via SVG files

> Attackers can upload malicious SVG files to execute JavaScript, stealing user sessions and cookies in the Fiora chat application.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 1 Oct 2025
- **Updated:** 1 Oct 2025
- **Also known as:** GHSA-2c6j-vw6r-mfch

## What is CVE-2025-56515?

CVE-2025-56515 is a high-severity cross-site scripting vulnerability in n/a, published on 1 Oct 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2025-56515?

2 open source packages ship an affected version, including fiora. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `fiora` | npm | All versions | None |
| `fiora` | npm | All versions | None |

Products: Suisuijiang Fiora.

## How do I fix CVE-2025-56515?

No fix has been published for CVE-2025-56515 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-56515 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-56515 exists.

Public exploit code:

- Cross-Site Scripting (XSS) Vulnerability in Fiora Chat Application (github_poc): https://github.com/Kov404/CVE-2025-56515

## Other vulnerabilities in n/a

- [CVE-2025-56514](https://insights.sbomify.com/CVE-2025-56514/): Fiora chat user avatar is vulnerable to XSS via SVG files (medium 4.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-56515 and fix it if it is affected.

What it is: CVE-2025-56515 is a high-severity cross-site scripting vulnerability in n/a, published on 1 Oct 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-56515 exists.

Affected packages and fixed versions:
- fiora (npm): affected all versions; no fix listed
- fiora (npm): affected all versions; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-56515/ (Markdown: https://insights.sbomify.com/CVE-2025-56515/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-56515
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-56515
- OSV: https://osv.dev/vulnerability/CVE-2025-56515

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-56515/
Summaries are generated and may contain mistakes; the official description above is the record.