@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.
CVE ID: CVE-2025-46553
CVSS Base Severity: LOW
CVSS Base Score: 2.1
CVSS 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
Vendor: misskey-dev
Product: summaly
EPSS Score: 0.1% (probability of being exploited)
EPSS Percentile: 28.11% (scored less or equal to compared to others)
EPSS Date: 2025-06-03 (when was this score calculated)
SSVC Exploitation: poc
SSVC Technical Impact: partial
SSVC Automatable: true