---
title: "CVE-2026-73628\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-73628?format=md
keywords: index, follow
---

# CVE-2026-73628

Publication date 13 August 2026

Last updated 19 August 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-73628)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-73628)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-73628)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-73628)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-73628>
* <https://github.com/s9y/Serendipity/security/advisories/GHSA-6c2x-mjmq-vx4q>
* <https://www.vulncheck.com/advisories/serendipity-reflected-xss-via-search-clean-url-route>