CVE-2025-46553
@misskey-dev/summaly Redirect Filter Bypass
Description
### Summary 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. ### Details In the main `summaly` function, a new `scrapingOptions` object is created and passed to either the matched plugin, if any, or the default summarize function. The issue here is that the new `scrapingOptions` object is not provided the `allowRedirects` property of `opts`. ### PoC - Publish a post containing a link to any URL that redirects on Misskey. - A preview will be generated for the target of the redirect, despite Misskey passing `allowRedirects: false`. ### Impact Misskey will follow redirects, despite explicitly requesting not to.
How to fix CVE-2025-46553
To remediate CVE-2025-46553, upgrade the affected package to a fixed version below.
- —upgrade to 5.2.1 or later
Is CVE-2025-46553 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 3.0.1, < 5.2.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |