CVE-2024-22778Public exploitNetwork attack vector

Unauthenticated server crash via malformed exportType

Published Feb 21, 2024 · Updated Nov 6, 2024

Denial of service in actionPandoc in HackMD CodiMD before 2.5.2 allows remote attackers to crash the server via a crafted query. The handler indexes outputFormats with the exportType query value before its try/catch, coercing an attacker-supplied object and raising an uncaught TypeError. A reachable note identifier and the Pandoc export endpoint are required; exploitation exits the process and interrupts service for all users.

CVSS severity7.5
High
EPSS probability0.69%
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 actionPandoc in HackMD CodiMD before 2.5.2 allows remote attackers to crash the server via a crafted query. The handler indexes outputFormats with the exportType query value before its try/catch, coercing an attacker-supplied object and raising an uncaught TypeError. A reachable note identifier and the Pandoc export endpoint are required; exploitation exits the process and interrupts service for all users.

The record

CVE
CVE-2024-22778
Published
Feb 21, 2024
Updated
Nov 6, 2024
Vendor
HackMD
Product
CodiMD
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HackMD · CodiMDversion=0 <2.5.2

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Endpoint Denial of Service Application 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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