CVE-2024-54730Public exploitNetwork attack vector

Service interruption via oversized image upload

Published Jan 14, 2025 · Updated Mar 18, 2025

Denial of service in Flatnotes before 5.3.1 allows remote authenticated users to interrupt the web service via image upload. The /api/attachments endpoint accepts and processes a large malformed multipart image body with attacker-controlled trailing data, exhausting server resources. A valid Flatnotes login and upload access are required; successful exploitation makes the web interface and other API endpoints unavailable.

CVSS severity7.5
High
EPSS probability0.51%
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 Flatnotes before 5.3.1 allows remote authenticated users to interrupt the web service via image upload. The /api/attachments endpoint accepts and processes a large malformed multipart image body with attacker-controlled trailing data, exhausting server resources. A valid Flatnotes login and upload access are required; successful exploitation makes the web interface and other API endpoints unavailable.

The record

CVE
CVE-2024-54730
Published
Jan 14, 2025
Updated
Mar 18, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

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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