# CVE-2017-2661: Cross-site scripting in pcs

> Cross-site scripting in ClusterLabs pcs allows attackers to inject scripts via cluster node names, potentially compromising user sessions.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **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:** Yes
- **Published:** 12 Mar 2018
- **Updated:** 16 Sep 2024
- **Also known as:** DEBIAN-CVE-2017-2661, GHSA-qc8r-mjjf-5j6v, UBUNTU-CVE-2017-2661

## What is CVE-2017-2661?

CVE-2017-2661 is a medium-severity cross-site scripting vulnerability in ClusterLabs pcs, published on 12 Mar 2018. 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

ClusterLabs pcs before version 0.9.157 is vulnerable to a cross-site scripting vulnerability due to improper validation of Node name field when creating new cluster or adding existing cluster.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2017-2661?

It affects 1 product.


Products: Clusterlabs Pcs.

## How do I fix CVE-2017-2661?

Upgrade to a fixed version.

## Is CVE-2017-2661 being exploited?

There is no known exploitation of CVE-2017-2661 in the wild and no public exploit code.

## Other vulnerabilities in ClusterLabs pcs

- [CVE-2023-2319](https://insights.sbomify.com/CVE-2023-2319/): It was discovered that an update for PCS package in RHBA-2023:2151 erratum released as part of Red Hat Enterprise Linux 9.2 failed to includ (critical 9.8)
- [CVE-2022-1049](https://insights.sbomify.com/CVE-2022-1049/): Auth bypass in clusterlabs/pcs (high 8.8)
- [CVE-2016-0720](https://insights.sbomify.com/CVE-2016-0720/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2016-0721](https://insights.sbomify.com/CVE-2016-0721/): Other in n/a (high 8.1)
- [CVE-2022-2735](https://insights.sbomify.com/CVE-2022-2735/): Privilege escalation in ClusterLabs/pcs (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-2661 and fix it if it is affected.

What it is: CVE-2017-2661 is a medium-severity cross-site scripting vulnerability in ClusterLabs pcs, published on 12 Mar 2018. 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-2017-2661 in the wild and no public exploit code.

Affected product: ClusterLabs pcs. 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-2017-2661/ (Markdown: https://insights.sbomify.com/CVE-2017-2661/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-2661
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-2661
- OSV: https://osv.dev/vulnerability/CVE-2017-2661

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-2661/
Summaries are generated and may contain mistakes; the official description above is the record.