Vulnerability in Cinnamon Kotaemon
CVE-2025-63914
An issue was discovered in Cinnamon kotaemon 0.11.0. The _may_extract_zip function in the \libs\ktem\ktem\index\file\ui.py file does not check the contents of uploaded ZIP files. Although the contents are extracted into a temporary folder that is cleared before each extraction, successfully uploading a ZIP bomb could still cause the server to consume excessive resources during decompression. Moreover, if no further files are uploaded afterward, the extracted data could occupy disk space and potentially render the system unavailable. Anyone with permission to upload files can carry out this attack.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (32.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Cinnamon Kotaemon — versions 0.11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/Cinnamon/kotaemon (Product)
- github.com/WxDou/CVE-2025-63914 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-63914?
- CVE-2025-63914 is a medium-severity vulnerability in Cinnamon Kotaemon, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2025-11-24.
- How severe is CVE-2025-63914?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-63914 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.