# CVE-2026-13567: code-projects Online Music Site POST Request Feedback.php cross site scripting

> Remote attackers can inject malicious scripts via feedback form fields in the Online Music Site application, potentially compromising user sessions.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **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:** 29 Jun 2026
- **Updated:** 29 Jun 2026
- **Also known as:** GHSA-j522-hg24-c99g

## What is CVE-2026-13567?

CVE-2026-13567 is a medium-severity cross-site scripting vulnerability in code-projects Online Music Site, published on 29 Jun 2026. 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

A security flaw has been discovered in code-projects Online Music Site 1.0. This affects an unknown part of the file /Frontend/Feedback.php of the component POST Request Handler. The manipulation of the argument fname/femail/faddress/fmessage results in cross site scripting. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-13567?


## How do I fix CVE-2026-13567?

No fix has been published for CVE-2026-13567 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-13567 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13567 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-13567 and fix it if it is affected.

What it is: CVE-2026-13567 is a medium-severity cross-site scripting vulnerability in code-projects Online Music Site, published on 29 Jun 2026. 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-2026-13567 exists.

Affected product: code-projects Online Music Site. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-13567/ (Markdown: https://insights.sbomify.com/CVE-2026-13567/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-13567
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-13567
- OSV: https://osv.dev/vulnerability/CVE-2026-13567

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-13567/
Summaries are generated and may contain mistakes; the official description above is the record.