by Kastro
Paper/Archive/CVE-2025-6507

CVE-2025-6507

h2oai h2oai/h2o-3 — Deserialization of Untrusted Data in h2oai/h2o-3

EPSS 17%public exploitCVSS 9.8
critical.is priorityof 100
59
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 97.1.971 × 2019.4Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
h2oai/h2o-3unspecified – < 3.46.0.83.46.0.8CNA

Scores by source

@huntr_ai (CNA)9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

refhuntr.com/bounties/0a9d527a-2d39-4bc0-bf01-1e717587f077refgithub.com/h2oai/h2o-3/commit/f714edd6b8429c7a7211b779b6ec108a95b7382d