# Sanitize vulnerable to Improper Input Validation and Cross-site Scripting

Advisory record · `GHSA-7f42-p84j-f58p`

- **Identifiers:** `GHSA-7f42-p84j-f58p` · `CVE-2018-3740`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-20](https://cwe.mitre.org/data/definitions/20.html) · [CWE-79](https://cwe.mitre.org/data/definitions/79.html)
- **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md) · [CWE-20](https://agentprime.io/advisories/tag/cwe-20.md)
- **Published:** 21 Mar 2018
- **Updated:** 16 Feb 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 21 Mar 2018, 11:56 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `sanitize` (RubyGems): affected `>=3.0.0, <4.6.3`; fixed in `4.6.3`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.5 High, CVSS 3.0: `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.015, the 74th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 21 Mar 2018. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-7f42-p84j-f58p](https://github.com/advisories/GHSA-7f42-p84j-f58p)
- [OSV: GHSA-7f42-p84j-f58p](https://osv.dev/vulnerability/GHSA-7f42-p84j-f58p)
- <https://nvd.nist.gov/vuln/detail/CVE-2018-3740>
- <https://github.com/rgrove/sanitize/issues/176>
- <https://github.com/rgrove/sanitize/commit/01629a162e448a83d901456d0ba8b65f3b03d46e>
- <https://github.com/rgrove/sanitize/commit/93feeb38e21864146bb29191792b971dbe1ec62e>
- <https://about.gitlab.com/2018/06/25/security-release-gitlab-11-dot-0-dot-1-released>
- <https://github.com/rgrove/sanitize>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sanitize/CVE-2018-3740.yml>
- <https://www.debian.org/security/2018/dsa-4358>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-7f42-p84j-f58p>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-7f42-p84j-f58p/>. Everything for agents: <https://agentprime.io/llms.txt>.