# CVE-2023-26430: Command injection in OX App Suite

> Authenticated attackers can inject control characters into SIEVE mail filters to bypass restrictions or disrupt processing, requiring vendor patches.

- **Severity:** Low 3.5 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N`)
- **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:** 2 Aug 2023
- **Updated:** 15 Oct 2024
- **Also known as:** GHSA-9rfr-rprq-pv78

## What is CVE-2023-26430?

CVE-2023-26430 is a low-severity command injection vulnerability in OX App Suite, published on 2 Aug 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Attackers with access to user accounts can inject arbitrary control characters to SIEVE mail-filter rules. This could be abused to access SIEVE extension that are not allowed by App Suite or to inject rules which would break per-user filter processing, requiring manual cleanup of such rules. We have added sanitization to all mail-filter APIs to avoid forwardning control characters to subsystems. No publicly available exploits are known.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2023-26430?

It affects 1 product.


Products: Open-Xchange Open-Xchange Appsuite Backend.

## How do I fix CVE-2023-26430?

No fix has been published for CVE-2023-26430 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-26430 being exploited?

There is no known exploitation of CVE-2023-26430 in the wild and no public exploit code.

## Other vulnerabilities in OX App Suite

- [CVE-2023-26451](https://insights.sbomify.com/CVE-2023-26451/): Weak cryptography in OX App Suite (high 7.5)
- [CVE-2023-26436](https://insights.sbomify.com/CVE-2023-26436/): Deserialization in OX App Suite (high 7.1)
- [CVE-2023-26428](https://insights.sbomify.com/CVE-2023-26428/): Missing authorization in OX App Suite (medium 6.5)
- [CVE-2023-26443](https://insights.sbomify.com/CVE-2023-26443/): SQL injection in OX App Suite (medium 5.5)
- [CVE-2023-26431](https://insights.sbomify.com/CVE-2023-26431/): Server-side request forgery in OX App Suite (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-26430 and fix it if it is affected.

What it is: CVE-2023-26430 is a low-severity command injection vulnerability in OX App Suite, published on 2 Aug 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-26430 in the wild and no public exploit code.

Affected product: OX App Suite. 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-2023-26430/ (Markdown: https://insights.sbomify.com/CVE-2023-26430/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-26430
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-26430
- OSV: https://osv.dev/vulnerability/CVE-2023-26430

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-26430/
Summaries are generated and may contain mistakes; the official description above is the record.