What is CVE-2025-46553?

CVE-2025-46553 is a medium-severity vulnerability in Misskey Summaly, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2025-05-05.

How severe is CVE-2025-46553?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2025-46553 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Open Redirect in Misskey Summaly

CVE-2025-46553

@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.

Vulnerability class: Open Redirect

EPSS: 0.002 (14.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Misskey Summaly
Misskey-dev Summaly — versions >= 3.0.1, < 5.2.1

Weakness classification (CWE)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2025-46553?: CVE-2025-46553 is a medium-severity vulnerability in Misskey Summaly, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2025-05-05.
How severe is CVE-2025-46553?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2025-46553 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.