CVE-2024-38354Public exploitNetwork attack vector

Cookie theft via iframe name DOM clobbering

Published Jul 10, 2024 · Updated Aug 2, 2024

Cross-site scripting in CodiMD before 2.5.4 allows remote attackers to steal a note viewer's cookies through a shared malicious note. The notebook renderer's sanitizer allowlist permits the name attribute on iframe elements, letting crafted markup shadow document properties through DOM clobbering. Exploitation requires a user to open the shared note; injected script runs in that viewer's browser and can read session cookies.

CVSS severity8.1
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in CodiMD before 2.5.4 allows remote attackers to steal a note viewer's cookies through a shared malicious note. The notebook renderer's sanitizer allowlist permits the name attribute on iframe elements, letting crafted markup shadow document properties through DOM clobbering. Exploitation requires a user to open the shared note; injected script runs in that viewer's browser and can read session cookies.

The record

CVE
CVE-2024-38354
Published
Jul 10, 2024
Updated
Aug 2, 2024
Vendor
HackMD
Product
CodiMD
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 <2.5.4
  2. Affected versionversion=< 2.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HackMD · CodiMDversion=0 <2.5.4; version=< 2.5.4

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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