Medium severity · published Sep 17, 2025
CVE-2025-35430
CISA Thorium insecure downloaded file path validation
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
CISA Thorium does not adequately validate the paths of downloaded files via 'download_ephemeral' and 'download_children'. A remote, authenticated attacker could access arbitrary files subject to file system permissions. Fixed in 1.1.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% 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-2025-35430
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-35430
Product
https://github.com/cisagov/thorium/blob/main/api/src/utils/bounder.rs#L120-L158
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-2025-35430
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