# CVE-2025-58447: rAthena has heap-based buffer overflow in login server

> Remote attackers can cause denial of service or execute code via heap overflow in the rAthena login server.

- **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:** 9 Sep 2025
- **Updated:** 10 Sep 2025
- **Also known as:** GHSA-4p33-6xqr-cm6x

## What is CVE-2025-58447?

CVE-2025-58447 is a critical memory corruption vulnerability in rathena, published on 9 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

rAthena is an open-source cross-platform massively multiplayer online role playing game (MMORPG) server. Versions prior to commit 2f5248b have a heap-based buffer overflow in the login server, remote attacker to overwrite adjacent session fields by sending a crafted `CA_SSO_LOGIN_REQ` with an oversized token length. This leads to immediate denial of service (crash) and it is possible to achieve remote code execution via heap corruption. Commit 2f5248b fixes the issue.

Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2025-58447?

It affects 1 product.


Products: Rathena Rathena.

## How do I fix CVE-2025-58447?

No fix has been published for CVE-2025-58447 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-58447 being exploited?

There is no known exploitation of CVE-2025-58447 in the wild and no public exploit code.

## Other vulnerabilities in rathena

- [CVE-2025-58448](https://insights.sbomify.com/CVE-2025-58448/): rAthena has SQL Injection in PartyBooking component via `WorldName` parameter. (critical 9.1)
- [CVE-2025-58750](https://insights.sbomify.com/CVE-2025-58750/): rAthena missing bound check in chclif_parse_moveCharSlot (high 8.2)
- [CVE-2025-62170](https://insights.sbomify.com/CVE-2025-62170/): rAthena map-server use-after-free vulnerability in RODEX (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-58447 and fix it if it is affected.

What it is: CVE-2025-58447 is a critical memory corruption vulnerability in rathena, published on 9 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-58447 in the wild and no public exploit code.

Affected product: rathena. 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-2025-58447/ (Markdown: https://insights.sbomify.com/CVE-2025-58447/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-58447
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-58447
- OSV: https://osv.dev/vulnerability/CVE-2025-58447

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-58447/
Summaries are generated and may contain mistakes; the official description above is the record.