# CVE-2023-30187: Memory corruption in n/a

> Remote attackers can execute arbitrary code via crafted JavaScript files due to out-of-bounds memory access in ONLYOFFICE DocumentServer.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Aug 2023
- **Updated:** 9 Jul 2026
- **Also known as:** GHSA-834c-mvqv-5x66

## What is CVE-2023-30187?

CVE-2023-30187 is a critical memory corruption vulnerability in n/a, published on 14 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An out of bounds memory access vulnerability in ONLYOFFICE DocumentServer 4.0.3 through 7.3.2 allows remote attackers to run arbitrary code via crafted JavaScript file.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2023-30187?

It affects 1 product.


Products: Onlyoffice Document Server.

## How do I fix CVE-2023-30187?

No fix has been published for CVE-2023-30187 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-30187 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-30187 exists.

## Other vulnerabilities in n/a

- [CVE-2021-3199](https://insights.sbomify.com/CVE-2021-3199/): ONLYOFFICE Docs Server Path Traversal (critical 9.8, exploited in the wild)
- [CVE-2023-30186](https://insights.sbomify.com/CVE-2023-30186/): Use after free in n/a (critical 9.8)
- [CVE-2021-25830](https://insights.sbomify.com/CVE-2021-25830/): Code injection in n/a (critical 9.8)
- [CVE-2021-25831](https://insights.sbomify.com/CVE-2021-25831/): Code injection in n/a (critical 9.8)
- [CVE-2021-25832](https://insights.sbomify.com/CVE-2021-25832/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-30187 and fix it if it is affected.

What it is: CVE-2023-30187 is a critical memory corruption vulnerability in n/a, published on 14 Aug 2023. 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-2023-30187 exists.

Affected product: n/a. 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-2023-30187/ (Markdown: https://insights.sbomify.com/CVE-2023-30187/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-30187
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-30187
- OSV: https://osv.dev/vulnerability/CVE-2023-30187

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-30187/
Summaries are generated and may contain mistakes; the official description above is the record.