{"id":"CVE-2025-67731","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-67731","generatedAt":"2026-10-27T23:10:19.625Z","title":"Prior to 1.2, the Express server used express.json() without a size limit, which could allow attackers to send extremely large request bodies.","description":"Servify Express is a Node.js package to start an Express server and log the port it's running on. Prior to 1.2, the Express server used express.json() without a size limit, which could allow attackers to send extremely large request bodies. This can cause excessive memory usage, degraded performance, or process crashes, resulting in a Denial of Service (DoS). Any application using the JSON parser without limits and exposed to untrusted clients is affected. The issue is not a flaw in Express itself, but in configuration. This issue is fixed in version 1.2. To work around, consider adding a limit option to the JSON parser, rate limiting at the application or reverse-proxy level, rejecting unusually large requests before parsing, or using a reverse proxy (such as NGINX) to enforce maximum request body sizes.","published":"2025-12-12T08:15:48.000Z","lastModified":"2026-10-07T20:10:02.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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/M"},"cwe":["CWE-400"],"affected":["servify-express.js/servify express"],"epss":{"score":0.00403,"percentile":0.34273,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/Aarondoran/servify-express/commit/8dff7f56504b356278d849734ef2050e5cd23b61","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/Aarondoran/servify-express/releases/tag/V1.2","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/Aarondoran/servify-express/security/advisories/GHSA-qgc4-8p88-4w7m","tags":["Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-67731","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}