CVE-2025-63914Public exploitNetwork attack vector

Service outage via unchecked ZIP decompression

Published Nov 24, 2025 · Updated Nov 24, 2025

Denial of service in Cinnamon kotaemon 0.11.0 allows remote authenticated users to exhaust server resources via a crafted ZIP upload. The _may_extract_zip function in libs/ktem/ktem/index/file/ui.py extracts archive members without size, count, ratio, or content limits. File-upload permission is required; successful exploitation can consume CPU, memory, and disk space until the service crashes or the host becomes unavailable.

CVSS severity6.5
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Cinnamon kotaemon 0.11.0 allows remote authenticated users to exhaust server resources via a crafted ZIP upload. The _may_extract_zip function in libs/ktem/ktem/index/file/ui.py extracts archive members without size, count, ratio, or content limits. File-upload permission is required; successful exploitation can consume CPU, memory, and disk space until the service crashes or the host becomes unavailable.

The record

CVE
CVE-2025-63914
Published
Nov 24, 2025
Updated
Nov 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-409, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-409Improper Handling of Highly Compressed Data (Data Amplification)
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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