# CVE-2023-27485: Insufficient verification of authorisation when accessing subresults in thmmniii/fbs-core

> Logged-in users can access other users' subresults due to insufficient authorization checks in the feedback system.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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:** 7 Mar 2023
- **Updated:** 25 Feb 2025
- **Also known as:** GHSA-fhq8-p3w6-mmgr

## What is CVE-2023-27485?

CVE-2023-27485 is a medium-severity missing authorization vulnerability in thm-mni-ii feedbacksystem, published on 7 Mar 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

thmmniii/fbs-core is an open source feedback system for students. In versions prior to 1.5.3 when querying `subresults`, it is possible to query `subresults` from other users due to insufficient authorisation. This is only possible for logged-in users and it is not possible to associate the subresults with a specific user. This bug was fixed in commit `f1ae67d8bb2`and released with version 1.5.3. Users are advised to upgrade. There are no known workarounds for this issue.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2023-27485?

It affects 1 product.


Products: Thm Feedbacksystem.

## How do I fix CVE-2023-27485?

No fix has been published for CVE-2023-27485 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-27485 being exploited?

There is no known exploitation of CVE-2023-27485 in the wild and no public exploit code.

## Other vulnerabilities in thm-mni-ii feedbacksystem

- [CVE-2023-37468](https://insights.sbomify.com/CVE-2023-37468/): Storing unencrypted LDAP passwords in feedbacksystem (medium 6.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-27485 and fix it if it is affected.

What it is: CVE-2023-27485 is a medium-severity missing authorization vulnerability in thm-mni-ii feedbacksystem, published on 7 Mar 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-2023-27485 in the wild and no public exploit code.

Affected product: thm-mni-ii feedbacksystem. 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-2023-27485/ (Markdown: https://insights.sbomify.com/CVE-2023-27485/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-27485
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-27485
- OSV: https://osv.dev/vulnerability/CVE-2023-27485

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-27485/
Summaries are generated and may contain mistakes; the official description above is the record.