# CVE-2018-20975: Cross-site scripting in fat_free_crm

> Cross-site scripting vulnerability in Fat Free CRM allows attackers to inject malicious scripts via the tags helper, potentially leading to session hijacking or code execution.

- **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:** 20 Aug 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-4p8f-mmfj-r45g

## What is CVE-2018-20975?

CVE-2018-20975 is a medium-severity cross-site scripting vulnerability in n/a, published on 20 Aug 2019. 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

Fat Free CRM before 0.18.1 has XSS in the tags_helper in app/helpers/tags_helper.rb.

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

## Which versions are affected by CVE-2018-20975?

2 open source packages ship an affected version, including fat_free_crm. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `fat_free_crm` | RubyGems | All versions | 0.18.1 |
| `fat_free_crm` | RubyGems | All versions | 0.18.1 |

Products: Fatfreecrm Fat Free Crm.

## How do I fix CVE-2018-20975?

Upgrade fat_free_crm to 0.18.1 or later.

## Is CVE-2018-20975 being exploited?

There is no known exploitation of CVE-2018-20975 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2015-1585](https://insights.sbomify.com/CVE-2015-1585/): Fat Free CRM Cross-Site Request Forgery vulnerability (medium 6.8)
- [CVE-2013-7223](https://insights.sbomify.com/CVE-2013-7223/): Fat Free CRM contains Cross-site Request Forgery vulnerablilities (medium 6.8)
- [CVE-2013-7225](https://insights.sbomify.com/CVE-2013-7225/): Fat Free CRM vulnerable to SQL Injection (medium 6.5)
- [CVE-2019-10226](https://insights.sbomify.com/CVE-2019-10226/): Cross-site scripting in n/a (medium 5.4)
- [CVE-2013-7222](https://insights.sbomify.com/CVE-2013-7222/): Fat Free CRM has fixed token value (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-20975 and fix it if it is affected.

What it is: CVE-2018-20975 is a medium-severity cross-site scripting vulnerability in n/a, published on 20 Aug 2019. 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-2018-20975 in the wild and no public exploit code.

Affected packages and fixed versions:
- fat_free_crm (RubyGems): affected all versions; fixed in 0.18.1
- fat_free_crm (RubyGems): affected all versions; fixed in 0.18.1

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-2018-20975/ (Markdown: https://insights.sbomify.com/CVE-2018-20975/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-20975
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-20975
- OSV: https://osv.dev/vulnerability/CVE-2018-20975

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-20975/
Summaries are generated and may contain mistakes; the official description above is the record.