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.
CVSS 6.1EPSS 0.155%Risk 0.62
View source- Published
- 2026-08-13 12:17:28
- Affected versions
- >=2.3.5,<=2.6.0
- Type
- Web application
- Last modified
- 2026-08-13 16:19:07
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N