# CVE-2026-6489: QueryMine sms Background Management addteacher.php unrestricted upload

> Remote attackers can upload malicious files via the addteacher.php script in QueryMine SMS, potentially leading to code execution.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Apr 2026
- **Updated:** 17 Apr 2026
- **Also known as:** GHSA-x6mf-8rqw-rvhf

## What is CVE-2026-6489?

CVE-2026-6489 is a medium-severity vulnerability in QueryMine sms, published on 17 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security flaw has been discovered in QueryMine sms up to 7ab5a9ea196209611134525ffc18de25c57d9593. This issue affects some unknown processing of the file admin/addteacher.php of the component Background Management Page. The manipulation of the argument image results in unrestricted upload. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-6489?


## How do I fix CVE-2026-6489?

No fix has been published for CVE-2026-6489 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6489 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6489 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6489 and fix it if it is affected.

What it is: CVE-2026-6489 is a medium-severity vulnerability in QueryMine sms, published on 17 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6489 exists.

Affected product: QueryMine sms. 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-2026-6489/ (Markdown: https://insights.sbomify.com/CVE-2026-6489/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6489
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6489
- OSV: https://osv.dev/vulnerability/CVE-2026-6489

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6489/
Summaries are generated and may contain mistakes; the official description above is the record.