# CVE-2021-43564: Unrestricted access to predictable file paths in hov/jobfair

> Unauthenticated attackers can download sensitive uploaded files by guessing predictable filenames in the TYPO3 Job Fair extension.

- **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:** Yes
- **Published:** 10 Nov 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-43g8-79x3-j898

## What is CVE-2021-43564?

CVE-2021-43564 is a high-severity vulnerability in n/a, published on 10 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in the jobfair (aka Job Fair) extension before 1.0.13 and 2.x before 2.0.2 for TYPO3. The extension fails to protect or obfuscate filenames of uploaded files. This allows unauthenticated users to download files with sensitive data by simply guessing the filename of uploaded files (e.g., uploads/tx_jobfair/cv.pdf).

## Which versions are affected by CVE-2021-43564?

4 open source packages ship an affected version, including hov/jobfair. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `hov/jobfair` | Packagist | All versions | 1.0.13 |
| `hov/jobfair` | Packagist | All versions | 1.0.13 |
| `hov/jobfair` | Packagist | From 2.0.0 | 2.0.2 |
| `hov/jobfair` | Packagist | From 2.0.0 | 2.0.2 |

Products: Job Fair Project Job Fair.

## How do I fix CVE-2021-43564?

Upgrade hov/jobfair to a fixed version for your release line: 1.0.13 or 2.0.2.

## Is CVE-2021-43564 being exploited?

There is no known exploitation of CVE-2021-43564 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2015-4606](https://insights.sbomify.com/CVE-2015-4606/): File upload in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-43564 and fix it if it is affected.

What it is: CVE-2021-43564 is a high-severity vulnerability in n/a, published on 10 Nov 2021. 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-2021-43564 in the wild and no public exploit code.

Affected packages and fixed versions:
- hov/jobfair (Packagist): affected all versions; fixed in 1.0.13
- hov/jobfair (Packagist): affected all versions; fixed in 1.0.13
- hov/jobfair (Packagist): affected from 2.0.0; fixed in 2.0.2
- hov/jobfair (Packagist): affected from 2.0.0; fixed in 2.0.2

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-2021-43564/ (Markdown: https://insights.sbomify.com/CVE-2021-43564/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-43564
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-43564
- OSV: https://osv.dev/vulnerability/CVE-2021-43564

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-43564/
Summaries are generated and may contain mistakes; the official description above is the record.