CVE-2024-38353: CodiMD allows realtime collaborative markdown notes on all platforms

Q: How do I fix CVE-2024-38353?

codimd: upgrade to 2.5.4. Exact commands for each OS are on this page.

Q: Is CVE-2024-38353 being exploited?

CVE-2024-38353 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-38353 affect?

CVE-2024-38353 affects codimd. Severity is medium (CVSS 5.3). CodiMD allows realtime collaborative markdown notes on all platforms. CodiMD before 2.5.4 is missing authentication and access control vulnerability allowing an unauthenticated attacker to gain unauthorised access to image data uploaded to

Q: How urgent is CVE-2024-38353?

Priority 45/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2024-38353 is a medium-severity flaw (CVSS 5.3) affecting codimd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CodiMD allows realtime collaborative markdown notes on all platforms. CodiMD before 2.5.4 is missing authentication and access control vulnerability allowing an unauthenticated attacker to gain unauthorised access to image data uploaded to CodiMD. CodiMD does not require valid authentication to access uploaded images or to upload new image data. An attacker who can determine an uploaded image's URL can gain unauthorised access to uploaded image d

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 33%)
CISA exploited list	No
Weakness	CWE-338, CWE-862
Published	2024-07-10
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: hackmd

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-07-10 20:15 UTCPublished CVE record published
2026-06-17 07:39 UTCUpdated Record last modified

hackmd codimd UPGRADE

Affected: < 2.5.4

Fixed in: 2.5.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy codimd || rpm -q codimd || codimd --version

2. UPGRADE to 2.5.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade codimd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade codimd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: CodiMD <2.5.4 - Insecure Filename Randomization

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-38353?

codimd: upgrade to 2.5.4. Exact commands for each OS are on this page.

Is CVE-2024-38353 being exploited?

CVE-2024-38353 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-38353 affect?

CVE-2024-38353 affects codimd. Severity is medium (CVSS 5.3). CodiMD allows realtime collaborative markdown notes on all platforms. CodiMD before 2.5.4 is missing authentication and access control vulnerability allowing an unauthenticated attacker to gain unauthorised access to image data uploaded to

How urgent is CVE-2024-38353?

Priority 45/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-46654 MEDIUM 4.9 UPGRADE CodiMD through 2.2.0 has a CSP-based protection mechanism against XSS through uploaded JavaScript content, but
CVE-2024-38354 HIGH 8.1 UPGRADE CodiMD allows realtime collaborative markdown notes on all platforms

References

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