# CVE-2024-13111: Beijing Yunfan Internet Technology Yunfan Learning Examination System JWT Token SysUserControl improper authentication

> Attackers can bypass authentication in the Yunfan Learning Examination System via improper JWT token handling, potentially gaining unauthorized access.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Jan 2025
- **Updated:** 2 Jan 2025
- **Also known as:** GHSA-9vhg-5pgx-8q97

## What is CVE-2024-13111?

CVE-2024-13111 is a medium-severity authentication bypass vulnerability in Beijing Yunfan Internet Technology Yunfan Learning Examination System, published on 2 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability classified as critical was found in Beijing Yunfan Internet Technology Yunfan Learning Examination System 1.9.2. Affected by this vulnerability is an unknown functionality of the file src/main/java/com/yf/exam/modules/sys/user/controller/SysUserControl of the component JWT Token Handler. The manipulation leads to improper authentication. The attack can be launched remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2024-13111?

It affects 1 product.


Products: Kaoshifeng Yunfan Learning Examination System.

## How do I fix CVE-2024-13111?

No fix has been published for CVE-2024-13111 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-13111 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-13111 exists.

## Other vulnerabilities in Beijing Yunfan Internet Technology Yunfan Learning Examination System

- [CVE-2024-13109](https://insights.sbomify.com/CVE-2024-13109/): Beijing Yunfan Internet Technology Yunfan Learning Examination System doc.html improper authorization (medium 6.9)
- [CVE-2024-13110](https://insights.sbomify.com/CVE-2024-13110/): Information disclosure in Yunfan Learning Examination System (medium 5.3)
- [CVE-2023-46963](https://insights.sbomify.com/CVE-2023-46963/): Information disclosure in n/a (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-13111 and fix it if it is affected.

What it is: CVE-2024-13111 is a medium-severity authentication bypass vulnerability in Beijing Yunfan Internet Technology Yunfan Learning Examination System, published on 2 Jan 2025. 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-2024-13111 exists.

Affected product: Beijing Yunfan Internet Technology Yunfan Learning Examination System. 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-2024-13111/ (Markdown: https://insights.sbomify.com/CVE-2024-13111/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-13111
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-13111
- OSV: https://osv.dev/vulnerability/CVE-2024-13111

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From sbomify Insights: https://insights.sbomify.com/CVE-2024-13111/
Summaries are generated and may contain mistakes; the official description above is the record.