Reflected Cross-Site Scripting in Serendipity by Serendipity Development Team
CVE-2026-73628

5.3MEDIUM

Key Information:

Vendor

S9y

Status
Serendipity
Vendor
CVE Published:
13 August 2026

What is CVE-2026-73628?

The Serendipity blogging platform versions 2.3.5 to 2.6.0 are exposed to a reflected cross-site scripting (XSS) vulnerability through the search clean-URL route (/search/). This issue arises from a flaw in the sanitization process within the serveSearch() function of functions_routing.inc.php, where the sanitization fails to properly handle URL-encoded HTML input. Consequently, malicious payloads can execute arbitrary JavaScript code in the user's browser by exploiting crafted search links. This vulnerability underscores the importance of rigorous input validation and sanitization practices in web applications.

Affected Version(s)

Serendipity 0

References

https://github.com/s9y/Serendipity/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/serendipity-reflecte...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

hutsbotnet
.