Rucio WebUI has a Stored Cross-site Scripting (XSS) Vulnerability in its Custom RSE Attribute
Date: 2026-02
Affected: pip/rucio-webui, pip/rucio-webui, pip/rucio-webui
Attack vector: xss
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2025-64501
CVE-2026-25136
CVE-2026-25733
CVE-2026-25734
CVE-2026-25735
CVE-2026-25736
CWE: CWE-1004
CWE-79
CVSS: 6.1 (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N)

### Summary A stored Cross-site Scripting (XSS) vulnerability was identified in the Custom RSE Attribute of the WebUI where attacker-controlled input is persisted by the backend and later rendered in the WebUI without proper output encoding. This allows arbitrary JavaScript execution in the context of the WebUI for users who view affected pages, potentially enabling session token theft or unauthorized actions. --- ### Details A stored XSS payload can be introduced via a custom RSE attribute value and is later rendered when the RSE is viewed. **Create Path**: Admin > RSE Management > _RSE NAME_ > Add Attribute **Trigger Path**: Admin > RSE Management > _RSE NAME_ **Request** ```http POST /proxy/rses/WEB1/attr/XSS HTTP/1.1 ... {"value":"<script>alert('XSS')</script>"} ``` **Response** ```http HTTP/1.1 201 CREATED ... Created ``` **Storing XSS Payload in RSE Attribute** <img width="1234" height="844" alt="Storing XSS Payload in RSE Attribute" src="https://github.com/user-attachments/assets/d10f58c2-8cea-43a9-bf7f-f94ef3d1fd81" /> **XSS Payload triggering when viewing RSE** <img width="1248" height="949" alt="XSS Payload triggering when viewing RSE" src="https://github.com/user-attachments/assets/d536fac2-ab44-4cfb-b669-085a8c3db33e" /> --- ### Impact Any authenticated user who views affected resources may execute attacker-controlled JavaScript in the WebUI origin. Depending on the affected feature, this may impact all users or administrative users only. The impact is


Mitigations:

Architectural layers (MAESTRO):