Semantic MediaWiki Special:SMWAdmin Reflected XSS Analysis & Fix

Vulnerability Overview Vulnerability Name: Reflected XSS in Special:SMWAdmin ID lookup via unescaped id parameter Vulnerability Type: Reflected Cross-Site Scripting (Reflected XSS) Affected Component: page of the Semantic MediaWiki extension Vulnerability Description: In the ID lookup feature of the page, the user-supplied parameter is directly output to the HTML response without being escaped. An attacker can craft a malicious link to induce users to visit it, thereby executing arbitrary JavaScript code. This vulnerability allows attackers to bypass the Same-Origin Policy, steal user sessions, or perform other malicious operations. Trigger Conditions: User visits a URL resembling The malicious payload contains unescaped tags or event handlers (e.g., ) --- Scope of Impact Affected Versions: Semantic MediaWiki 1.9.0 through 3.1.1 (inclusive) All MediaWiki instances using the above versions with the feature enabled Affected Users: All users accessing this page (particularly administrators or users with edit privileges) Attackers can use phishing links to lure target users to visit the malicious URL Severity: High (CVSS score not provided, but classified as Reflected XSS capable of executing arbitrary JavaScript) --- Remediation Officially Patched Version: Semantic MediaWiki 3.1.2 and later versions have fixed this vulnerability Temporary Mitigation Measures: 1. Upgrade to the latest stable version of Semantic MediaWiki (≥ 3.1.2) 2. If immediate upgrade is not possible, disable the feature (via configuration or permission controls) 3. Add a Content Security Policy (CSP) header at the web server level to restrict inline script execution Fix Principle: Perform HTML entity encoding on the parameter before outputting it to the page to prevent malicious script injection. --- POC / Exploit Code Full Exploit Example URL: > Note: In actual exploitation, replace the tag with a payload that triggers XSS, such as: > - > - --- Additional Information Reporter: Anonymous (submitted via GitHub Issue) Disclosure Date: October 15, 2023 (inferred from page metadata) Related CVE: None (no CVE number mentioned on the page) Recommended Actions: Immediately upgrade or disable the relevant functionality; monitor logs for suspicious access records

Goal Reached Thanks to every supporter — we hit 100%!

Semantic MediaWiki Special:SMWAdmin Reflected XSS Analysis & Fix

More from this source