Rucio up to 35.8.2/38.5.3/39.3.0 cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Rucio up to 35.8.2/38.5.3/39.3.0. This issue affects some unknown processing. Performing a manipulation results in cross site scripting. This vulnerability is identified as CVE-2026-25733. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Rucio up to 35.8.2/38.5.3/39.3.0. It has been classified as problematic. This affects an unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. Versions prior to 35.8.3, 38.5.4, and 39.3.1 have a stored Cross-Site Scripting (XSS) vulnerability in the Custom Rules function 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. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-25733 since 02/05/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 35.8.3, 38.5.4 or 39.3.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• Rucio

Version

• 35.8.0
• 35.8.1
• 35.8.2
• 38.5.0
• 38.5.1
• 38.5.2
• 38.5.3
• 39.0
• 39.1
• 39.2
• 39.3.0

Website

• Product: https://github.com/rucio/rucio/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion