# CVE-2025-8261: Vaelsys VaelsysV4 User Creation vgrid_server.php improper authorization

> Remote attackers with administrative privileges may exploit improper authorization in the user creation handler, though the vendor disputes the severity.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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:** Not needed
- **Fix available:** No
- **Published:** 28 Jul 2025
- **Updated:** 15 Apr 2026
- **Also known as:** GHSA-7xg6-2whq-73vv

## What is CVE-2025-8261?

CVE-2025-8261 is a medium-severity missing authorization vulnerability in VaelsysV4, published on 28 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A weakness has been identified in Vaelsys VaelsysV4 4.1.0. This vulnerability affects unknown code of the file /grid/vgrid_server.php of the component User Creation Handler. Executing a manipulation can lead to improper authorization. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The real existence of this vulnerability is still doubted at the moment. The vendor explains: "Based on Vaelsys' analysis, the reported behavior does not allow actions beyond those already permitted to authenticated administrative users, and no change in system configuration or operational practices is necessary."

Weakness: CWE-285 (Improper Authorization), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2025-8261?

It affects 1 product.


Products: Vaelsys Vaelsys.

## How do I fix CVE-2025-8261?

No fix has been published for CVE-2025-8261 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-8261 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8261 exists.

## Other vulnerabilities in VaelsysV4

- [CVE-2026-2952](https://insights.sbomify.com/CVE-2026-2952/): Vaelsys HTTP POST Request tree_server.php os command injection (medium 6.9)
- [CVE-2025-8259](https://insights.sbomify.com/CVE-2025-8259/): Vaelsys VaelsysV4 Web interface vgrid_server.php execute_DataObjectProc os command injection (medium 6.9)
- [CVE-2025-8260](https://insights.sbomify.com/CVE-2025-8260/): Vaelsys VaelsysV4 Web interface vgrid_server.php weak hash (low 2.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-8261 and fix it if it is affected.

What it is: CVE-2025-8261 is a medium-severity missing authorization vulnerability in VaelsysV4, published on 28 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8261 exists.

Affected product: VaelsysV4. 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-2025-8261/ (Markdown: https://insights.sbomify.com/CVE-2025-8261/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-8261
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-8261
- OSV: https://osv.dev/vulnerability/CVE-2025-8261

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-8261/
Summaries are generated and may contain mistakes; the official description above is the record.