# CVE-2025-0309: Netskope Client Local Elevation of Privileges

> Local attackers can elevate privileges by exploiting insufficient server endpoint validation in the Netskope Client.

- **Severity:** Medium 6.0 (`CVSS:4.0/AV:P/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Aug 2025
- **Updated:** 15 Aug 2025
- **Also known as:** GHSA-f728-v2h3-3vfv

## What is CVE-2025-0309?

CVE-2025-0309 is a medium-severity vulnerability in Netskope Client, published on 14 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An insufficient validation on the server connection endpoint in Netskope Client allows local users to elevate privileges on the system. The insufficient validation allows Netskope Client to connect to any other server with Public Signed CA TLS certificates and send specially crafted responses to elevate privileges.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2025-0309?


## How do I fix CVE-2025-0309?

No fix has been published for CVE-2025-0309 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-0309 being exploited?

There is no known exploitation of CVE-2025-0309 in the wild and no public exploit code.

Public exploit code:

- Custom IPC Client and Proof of Concept exploit for CVE-2025-0309 (Netskope Windows Client LPE) (github_poc): https://github.com/AmberWolfCyber/UpSkope

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-0309 and fix it if it is affected.

What it is: CVE-2025-0309 is a medium-severity vulnerability in Netskope Client, published on 14 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-0309 in the wild and no public exploit code.

Affected product: Netskope Client. 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-2025-0309/ (Markdown: https://insights.sbomify.com/CVE-2025-0309/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-0309
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-0309
- OSV: https://osv.dev/vulnerability/CVE-2025-0309

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-0309/
Summaries are generated and may contain mistakes; the official description above is the record.