CVE-2025-46553
@misskey-dev/summaly Redirect Filter Bypass
Impact
### 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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @misskey-dev/summaly | >= 3.0.1, < 5.2.1 | 5.2.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Misskey | Summaly | from 3.0.1 before 5.2.1 |