Vulnerabilities CVE-2026-73628

CVE-2026-73628

Medium

Open

TLP:CLEAR

Serendipity 2.3.5 Reflected XSS via search clean-URL route

NVD CVE.org

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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.

Details

CVSS Score: 5.3
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Confidence: 90%
Published: Aug 13, 2026
Last Modified: Aug 13, 2026

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