Arbitrary file upload in Sim
CVE-2025-9800
A weakness has been identified in SimStudioAI sim up to ed9b9ad83f1a7c61f4392787fb51837d34eeb0af. Affected by this issue is the function Import of the file apps/sim/app/api/files/upload/route.ts of the component HTML File Parser. Executing manipulation of the argument File can lead to unrestricted upload. The attack may be launched remotely. The exploit has been made available to the public and could be exploited. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. This patch is called 45372aece5e05e04b417442417416a52e90ba174. A patch should be applied to remediate this issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (22.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Sim
- Simstudioai Sim — versions ed9b9ad83f1a7c61f4392787fb51837d34eeb0af
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/simstudioai/sim/issues/958 (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- github.com/simstudioai/sim/issues/958 (issue-tracking, Patch, Issue Tracking)
- github.com/simstudioai/sim/issues/958 (issue-tracking, Exploit, exploit, Issue Tracking, Vendor Advisory)
- github.com/simstudioai/sim/commit/45372aece5e05e04b417442417416a52e90ba174 (Patch, patch)
Frequently asked questions
- What is CVE-2025-9800?
- CVE-2025-9800 is a medium-severity vulnerability in Sim, classified under Improper Access Control. CVSS score: 6.3/10. Published 2025-09-01.
- How severe is CVE-2025-9800?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2025-9800 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.