What is GHSA-4g8w-wg6x-gvqc?

GHSA-4g8w-wg6x-gvqc is a security advisory published by GitHub Security Advisories with Medium severity. Serendipity versions \u003e= 2.3.5 and \u003c= 2.6.0 contain a reflected cross-site scripting vulnerability...

Which CVE IDs does GHSA-4g8w-wg6x-gvqc cover?

GHSA-4g8w-wg6x-gvqc covers the following CVE IDs: CVE-2026-73628. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-4g8w-wg6x-gvqc?

GHSA-4g8w-wg6x-gvqc has a CVSS v3 base score of 6.1, published by GitHub Security Advisories.

GHSA-4g8w-wg6x-gvqcMediumCVSS 6.1

Serendipity versions >= 2.3.5 and <= 2.6.0 contain a reflected cross-site scripting vulnerability...

Vendor

GitHub Security Advisories

Published

August 13, 2026

Last Modified

August 13, 2026

🔗 CVE IDs covered (1)

CVE-2026-73628 →

📋 Description

Serendipity versions >= 2.3.5 and <= 2.6.0 contain a reflected cross-site scripting vulnerability in the search clean-URL route (/search/). 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.

🔗 References (4)

https://github.com/s9y/Serendipity/security/advisories/GHSA-6c2x-mjmq-vx4q
https://nvd.nist.gov/vuln/detail/CVE-2026-73628
https://www.vulncheck.com/advisories/serendipity-reflected-xss-via-search-clean-url-route
https://github.com/advisories/GHSA-4g8w-wg6x-gvqc