Description
Serendipity versions >= 2.3.5 and <= 2.6.0 contain a reflected cross-site scripting vulnerability in the search clean-URL route (/search/<term>). In include/functions_routing.inc.php serveSearch(), the sanitisation pipeline runs urldecode() after HTML-encoding, so a single URL-encoded HTML payload survives strip_tags() and htmlspecialchars() and is then decoded back into live HTML in the page. A crafted search link can execute arbitrary JavaScript in the victim's browser. Fixed in 2.6.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| s9y | Serendipity | 2.3.5 – ≤ 2.6.0 | — |
References
- GitHub Security Advisory (GHSA-6c2x-mjmq-vx4q) vendor-advisory
- VulnCheck Advisory: Serendipity 2.3.5 Reflected XSS via search clean-URL route third-party-advisory