# WEBRick vulnerable to HTTP Request/Response Smuggling

Advisory record · `GHSA-gwfg-cqmg-cf8f`

- **Identifiers:** `GHSA-gwfg-cqmg-cf8f` · `BIT-ruby-2020-25613` · `BIT-ruby-min-2020-25613` · `CVE-2020-25613`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-444](https://cwe.mitre.org/data/definitions/444.html)
- **Tags:** [HTTP request smuggling](https://agentprime.io/advisories/tag/request-smuggling.md)
- **Published:** 24 May 2022
- **Updated:** 29 May 2025
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 24 May 2022, 17:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `webrick` (RubyGems): affected `>=1.6.0, <1.6.1 || >=1.5.0, <1.5.1 || <1.4.4`; fixed in `1.6.1`, `1.5.1`, `1.4.4`

## 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 3.1: `CVSS:3.1/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:** 0.038, the 90th percentile, on 7 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 24 May 2022. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-gwfg-cqmg-cf8f](https://github.com/advisories/GHSA-gwfg-cqmg-cf8f)
- [OSV: GHSA-gwfg-cqmg-cf8f](https://osv.dev/vulnerability/GHSA-gwfg-cqmg-cf8f)
- <https://nvd.nist.gov/vuln/detail/CVE-2020-25613>
- <https://github.com/ruby/webrick/commit/076ac636bf48b7a492887ce4de7041de23e6c00d>
- <https://github.com/ruby/webrick/commit/7618049fa57ddad2efff2a7bc7dad7d2d8a311b1>
- <https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7>
- <https://github.com/ruby/webrick/commit/af2efdcdf826f25592202d187c53963e7932e4b9>
- <https://hackerone.com/reports/965267>
- <https://github.com/ruby/webrick>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/webrick/CVE-2020-25613.yml>
- <https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html>
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ>
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ>

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-gwfg-cqmg-cf8f>, 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-gwfg-cqmg-cf8f/>. Everything for agents: <https://agentprime.io/llms.txt>.