# CVE-2023-47107: PILOS account takeover through password reset poisoning

> Attackers can poison password reset links via Host header manipulation to steal tokens and take over local user accounts.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Nov 2023
- **Updated:** 4 Sep 2024
- **Also known as:** GHSA-mc6f-fj9h-5735

## What is CVE-2023-47107?

CVE-2023-47107 is a high-severity vulnerability in THM-Health PILOS, published on 8 Nov 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

PILOS is an open source front-end for BigBlueButton servers with a built-in load balancer. The password reset component deployed within PILOS uses the hostname supplied within the request host header when building a password reset URL. It may be possible to manipulate the URL sent to PILOS users when so that it points to the attackers server thereby disclosing the password reset token if/when the link is followed. This only affects local user accounts and requires the password reset option to be enabled. This issue has been patched in version 2.3.0.

Weakness: CWE-640 (Weak Password Recovery Mechanism for Forgotten Password), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2023-47107?

It affects 1 product.


Products: Thm Pilos.

## How do I fix CVE-2023-47107?

No fix has been published for CVE-2023-47107 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-47107 being exploited?

There is no known exploitation of CVE-2023-47107 in the wild and no public exploit code.

## Other vulnerabilities in THM-Health PILOS

- [CVE-2025-62523](https://insights.sbomify.com/CVE-2025-62523/): PILOS Misconfigured the Access-Control-Allow-Origin Header (medium 6.3)
- [CVE-2025-62524](https://insights.sbomify.com/CVE-2025-62524/): PILOS Exposes PHP version (medium 5.3)
- [CVE-2025-62781](https://insights.sbomify.com/CVE-2025-62781/): PILOS is missing session regeneration after password change (medium 5.0)
- [CVE-2026-22800](https://insights.sbomify.com/CVE-2026-22800/): PILOS affected by a CSRF via GET request allows unintentional termination of all active video conferences (low 2.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-47107 and fix it if it is affected.

What it is: CVE-2023-47107 is a high-severity vulnerability in THM-Health PILOS, published on 8 Nov 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-47107 in the wild and no public exploit code.

Affected product: THM-Health PILOS. 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-2023-47107/ (Markdown: https://insights.sbomify.com/CVE-2023-47107/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-47107
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-47107
- OSV: https://osv.dev/vulnerability/CVE-2023-47107

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-47107/
Summaries are generated and may contain mistakes; the official description above is the record.