What is CVE-2026-73628?

CVE-2026-73628 is a medium-severity vulnerability in S9y Serendipity, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-13.

How severe is CVE-2026-73628?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in S9y Serendipity

CVE-2026-73628

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(…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

S9y Serendipity — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-73628?: CVE-2026-73628 is a medium-severity vulnerability in S9y Serendipity, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-13.
How severe is CVE-2026-73628?: Medium severity. CVSS v3 base score is 6.1 out of 10.