CVE-2025-65431

# CVE-2025-65431 PoC - django-allauth preferred_username Manipulation # This PoC demonstrates the identification bypass vulnerability import requests import json def exploit_cve_2025_65431(): """ Simulated PoC for CVE-2025-65431 Attack scenario: Manipulating preferred_username to hijack accounts """ print("=== CVE-2025-65431 Exploitation Simulation ===") print("Target: django-allauth < 65.13.0") print("Vulnerability: preferred_username used for authorization ") # Step 1: Attacker has legitimate Okta/NetIQ account attacker_id_token = { "sub": "attacker-unique-id-12345", "preferred_username": "[email protected]", "email": "[email protected]", "name": "Attacker User" } # Step 2: Attacker modifies preferred_username to victim's username # In real attack, this depends on Okta/NetIQ configuration modified_id_token = { "sub": "attacker-unique-id-12345", "preferred_username": "[email protected]", "email": "[email protected]", "name": "Attacker User" } # Step 3: System uses preferred_username for linking/authorization # Vulnerable code would link attacker to victim's account print("[VULNERABLE] preferred_username: [email protected]") print("[VULNERABLE] System links attacker to victim account") print("[VULNERABLE] Attacker gains unauthorized access to victim's resources ") # Step 4: After patch, system uses immutable 'sub' field print("[PATCHED] Using 'sub' field for user identification") print("[PATCHED] sub: attacker-unique-id-12345 (immutable)") print("[PATCHED] Attacker cannot impersonate victim") return True def check_vulnerable_version(): """ Check if django-allauth version is vulnerable """ # Vulnerable versions: < 65.13.0 vulnerable = True version = "65.12.0" if vulnerable: print(f"[VULN] Installed version: {version} (VULNERABLE)") print("[VULN] Recommendation: Upgrade to django-allauth >= 65.13.0") else: print(f"[SAFE] Installed version: {version} (PATCHED)") if __name__ == "__main__": exploit_cve_2025_65431() check_vulnerable_version()

{"cve": {"id": "CVE-2025-65431", "sourceIdentifier": "[email protected]", "published": "2025-12-15T14:15:57.133", "lastModified": "2025-12-23T18:08:38.100", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in allauth-django before 65.13.0. Both Okta and NetIQ were using preferred_username as the identifier for third-party provider accounts. That value may be mutable and should therefore be avoided for authorization decisions. The providers are now using sub instead."}], "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:N/S:U/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-287"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:allauth:allauth:*:*:*:*:*:django:*:*", "versionEndExcluding": "65.13.0", "matchCriteriaId": "64041413-AFF0-4ABD-9781-3F59ACEFE49C"}]}]}], "references": [{"url": "https://allauth.org/news/2025/10/django-allauth-65.13.0-released/", "source": "[email protected]", "tags": ["Release Notes"]}]}}