{"id":"CVE-2025-6507","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-6507","generatedAt":"2026-10-28T00:18:38.237Z","title":"A vulnerability in the h2oai/h2o-3 repository allows attackers to exploit deserialization of untrusted data, potentially leading to arbitrary code execution and reading of system files.","description":"A vulnerability in the h2oai/h2o-3 repository allows attackers to exploit deserialization of untrusted data, potentially leading to arbitrary code execution and reading of system files. This issue affects the latest master branch version 3.47.0.99999. The vulnerability arises from the ability to bypass regular expression filters intended to prevent malicious parameter injection in JDBC connections. Attackers can manipulate spaces between parameters to evade detection, allowing for unauthorized file access and code execution. The vulnerability is addressed in version 3.46.0.8.","published":"2025-09-01T06:15:36.000Z","lastModified":"2026-06-17T10:02:02.000Z","status":"Deferred","sourceIdentifier":"security@huntr.dev","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-502"],"affected":[],"epss":{"score":0.16938,"percentile":0.9704,"date":"2026-10-26","history":[{"date":"2026-10-10","score":0.1551,"percentile":0.96734},{"date":"2026-10-13","score":0.16938,"percentile":0.97006}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 16.9%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://github.com/h2oai/h2o-3/commit/f714edd6b8429c7a7211b779b6ec108a95b7382d","source":"security@huntr.dev"},{"url":"https://huntr.com/bounties/0a9d527a-2d39-4bc0-bf01-1e717587f077","source":"security@huntr.dev"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-6507","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."}