# CVE-2019-19998: XML external entity in n/a

> An attacker can exploit an XML External Entity vulnerability in the WeChat public plugin to read sensitive files or cause denial of service.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Dec 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-9vpm-fw8c-289m

## What is CVE-2019-19998?

CVE-2019-19998 is a high-severity vulnerability in n/a, published on 26 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Xiuno BBS 4.0 allows XXE via plugin/xn_wechat_public/route/token.php.

Weakness: CWE-611 (Improper Restriction of XML External Entity Reference)

## Which versions are affected by CVE-2019-19998?

It affects 1 product.


Products: Xiuno Xiunobbs.

## How do I fix CVE-2019-19998?

No fix has been published for CVE-2019-19998 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-19998 being exploited?

There is no known exploitation of CVE-2019-19998 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-19914](https://insights.sbomify.com/CVE-2020-19914/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2020-21494](https://insights.sbomify.com/CVE-2020-21494/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2020-21495](https://insights.sbomify.com/CVE-2020-21495/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2020-21496](https://insights.sbomify.com/CVE-2020-21496/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2018-15559](https://insights.sbomify.com/CVE-2018-15559/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-19998 and fix it if it is affected.

What it is: CVE-2019-19998 is a high-severity vulnerability in n/a, published on 26 Dec 2019. 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-2019-19998 in the wild and no public exploit code.

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-2019-19998/ (Markdown: https://insights.sbomify.com/CVE-2019-19998/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-19998
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-19998
- OSV: https://osv.dev/vulnerability/CVE-2019-19998

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-19998/
Summaries are generated and may contain mistakes; the official description above is the record.