Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsUpgrade flarum/core
to version 1.8.10 or higher.
flarum/core is a simple discussion platform for your website.
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') via authoritative subdomain cookie overwrite. An attacker controlling a subdomain under the parent domain can set cookies scoped to the parent domain. This allows the attacker to replace session tokens for applications hosted on sibling subdomains if session tokens aren't rotated post-authentication.