Critical severity · published Sep 17, 2025
CVE-2025-35434
CISA Thorium does not validate TLS connections to Elasticsearch
9.8
CVSS
0.2%
EPSS
No
On KEV
Description
CISA Thorium does not validate TLS certificates when connecting to Elasticsearch. An unauthenticated attacker with access to a Thorium cluster could impersonate the Elasticsearch service. Fixed in 1.1.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TH
Thorium · CISA
1.0.0 before 1.1.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-35434
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-35434
Product
https://github.com/cisagov/thorium/blob/main/api/src/models/backends/setup/elastic_setup.rs#L36-L43
Release Notes
https://github.com/cisagov/thorium/releases/tag/1.1.2
Vendor Advisory
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-259-01.json
Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2025-35434
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