# CVE-2021-25630: Privilege escalation in Collabora Online

> A local attacker can exploit a flawed user check in the privileged loolforkit program to gain root privileges on systems running Collabora Online or LibreOffice Online.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Feb 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-49w3-gr3w-m68v

## What is CVE-2021-25630?

CVE-2021-25630 is a high-severity vulnerability in Collabora Online, published on 23 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

"loolforkit" is a privileged program that is supposed to be run by a special, non-privileged "lool" user. Before doing anything else "loolforkit" checks, if it was invoked by the "lool" user, and refuses to run with privileges, if it's not the case. In the vulnerable version of "loolforkit" this check was wrong, so a normal user could start "loolforkit" and eventually get local root privileges.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2021-25630?

It affects 1 product.


Products: Collaboraoffice Online.

## How do I fix CVE-2021-25630?

No fix has been published for CVE-2021-25630 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25630 being exploited?

There is no known exploitation of CVE-2021-25630 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25630 and fix it if it is affected.

What it is: CVE-2021-25630 is a high-severity vulnerability in Collabora Online, published on 23 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-25630 in the wild and no public exploit code.

Affected product: Collabora Online. 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-2021-25630/ (Markdown: https://insights.sbomify.com/CVE-2021-25630/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25630
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25630
- OSV: https://osv.dev/vulnerability/CVE-2021-25630

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25630/
Summaries are generated and may contain mistakes; the official description above is the record.