CVE-2025-49590: Incomplete Denylist to Cross-Site Scripting

CryptPad is a collaboration suite. Prior to version 2025.3.0, the "Link Bouncer" functionality attempts to filter javascript URIs to prevent Cross-Site Scripting XSS, however this can be bypassed. There is an "early allow" code path that happens before the URI's protocol/scheme is checked, which ...