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CVE-2025-6544

A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.8, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and using double URL encoding. This issue impacts all users of the affected versions.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:264ccc666ab60b35373cb92c4ca890d42b0d6c29f7ab2c4a2dfd1225237ba51f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"h2oai/h2o-3","vendor":"h2oai","versions":[{"lessThan":"3.46.8","status":"affected","version":"unspecified","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:242f13eb647386259aa8db07d430b85a63a5d91802599af3d84624e29f8aba03 · sha256:c4e41157d7c94b91… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:242f13eb647386259aa8db07d430b85a63a5d91802599af3d84624e29f8aba03 · sha256:c4e41157d7c94b91… · /containers/cna/metrics/0/cvssV3_0

CWE assertions

1 source assertion
{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:242f13eb647386259aa8db07d430b85a63a5d91802599af3d84624e29f8aba03 · sha256:c4e41157d7c94b91… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"https://github.com/h2oai/h2o-3/commit/0298ee348f5c73673b7b542158081e79605f5f25"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:242f13eb647386259aa8db07d430b85a63a5d91802599af3d84624e29f8aba03 · sha256:c4e41157d7c94b91… · /containers/cna/references/1
{"url":"https://huntr.com/bounties/53f35a0f-d644-4f82-93aa-89fe7e0aed40"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:242f13eb647386259aa8db07d430b85a63a5d91802599af3d84624e29f8aba03 · sha256:c4e41157d7c94b91… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://huntr.com/bounties/53f35a0f-d644-4f82-93aa-89fe7e0aed40"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:242f13eb647386259aa8db07d430b85a63a5d91802599af3d84624e29f8aba03 · sha256:c4e41157d7c94b91… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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