Is this vulnerability remotely exploitable?

Yes. Any attacker who can access the Rucio WebUI and submit Custom Rules with malicious content can remotely exploit the issue, provided another user subsequently views the affected pages in their browser.

Does an attacker need authentication or special permissions to exploit this?

Exploitation requires at least the level of access necessary to create or modify Custom Rules. In many deployments this implies an authenticated user with specific privileges, but the exact requirement depends on how roles and permissions are configured in a given Rucio instance.

What is the safest general fix pattern for this vulnerability class?

The most robust pattern is to enforce context-aware output encoding for all user-controlled data at render time, supported by a templating or frontend framework that auto-escapes by default. Complement this with strict input validation for rule fields and ensure that session cookies are marked HttpOnly and Secure to limit the impact of any residual XSS.

Severity:

HIGH RISK

(7.3)

Stored Cross-Site Scripting (CWE-79) in Rucio WebUI Custom Rules

CVE-2026-25733

Published:

Feb 25, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Cross-Site Scripting (Stored XSS)

CWE:

CWE-79;CWE-1004

Impact:

Arbitrary JavaScript Execution in User Browsers

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Cross-Site Scripting (Stored XSS)

CWE:

CWE-79;CWE-1004

Impact:

Arbitrary JavaScript Execution in User Browsers

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Stored Cross-Site Scripting (CWE-79) in Rucio WebUI Custom Rules

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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