# CVE-2021-47912: PHP Melody 3.0 Non-Persistent Cross-Site Scripting via Multiple Parameters

> Attackers can inject malicious scripts via unvalidated parameters in PHP Melody to execute client-side attacks and hijack user sessions.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 1 Feb 2026
- **Updated:** 5 Mar 2026
- **Also known as:** GHSA-f7c7-p5x7-c759

## What is CVE-2021-47912?

CVE-2021-47912 is a medium-severity cross-site scripting vulnerability in PHPSUGAR PHP Melody, published on 1 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

PHP Melody version 3.0 contains multiple non-persistent cross-site scripting vulnerabilities in categories, import, and user import files. Attackers can inject malicious scripts through unvalidated parameters to execute client-side attacks and potentially hijack user sessions.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-47912?

It affects 1 product.


Products: Phpsugar Php Melody.

## How do I fix CVE-2021-47912?

No fix has been published for CVE-2021-47912 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47912 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47912 exists.

## Other vulnerabilities in PHPSUGAR PHP Melody

- [CVE-2018-5211](https://insights.sbomify.com/CVE-2018-5211/): SQL injection in n/a (critical 9.8)
- [CVE-2017-15081](https://insights.sbomify.com/CVE-2017-15081/): SQL injection in n/a (critical 9.8)
- [CVE-2017-15579](https://insights.sbomify.com/CVE-2017-15579/): SQL injection in n/a (critical 9.8)
- [CVE-2017-15578](https://insights.sbomify.com/CVE-2017-15578/): SQL injection in n/a (high 8.8)
- [CVE-2021-47915](https://insights.sbomify.com/CVE-2021-47915/): PHP Melody 3.0 SQL Injection Vulnerability via Edit Video Parameter (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47912 and fix it if it is affected.

What it is: CVE-2021-47912 is a medium-severity cross-site scripting vulnerability in PHPSUGAR PHP Melody, published on 1 Feb 2026. Any signed-in user can exploit it over the network, 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-2021-47912 exists.

Affected product: PHPSUGAR PHP Melody. 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-2021-47912/ (Markdown: https://insights.sbomify.com/CVE-2021-47912/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47912
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47912
- OSV: https://osv.dev/vulnerability/CVE-2021-47912

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-47912/
Summaries are generated and may contain mistakes; the official description above is the record.