CVE-2024-38354: CodiMD allows realtime collaborative markdown notes on all platforms

Q: How do I fix CVE-2024-38354?

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

Q: Is CVE-2024-38354 being exploited?

CVE-2024-38354 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-2024-38354 affect?

CVE-2024-38354 affects codimd. Severity is high (CVSS 8.1). CodiMD allows realtime collaborative markdown notes on all platforms. The notebook feature of Hackmd.io permits the rendering of iframe `HTML` tags with an improperly sanitized `name` attribute. This vulnerability enables attackers to perfo

Q: How urgent is CVE-2024-38354?

Priority 42/100. High severity; Public exploit reference

This month

HIGH 8.1UPGRADE

CVE-2024-38354 is a high-severity flaw (CVSS 8.1) 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. The notebook feature of Hackmd.io permits the rendering of iframe `HTML` tags with an improperly sanitized `name` attribute. This vulnerability enables attackers to perform cross-site scripting (XSS) attacks via DOM clobbering. This vulnerability is fixed in 2.5.4.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-79
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.

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-2024-38354?

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

Is CVE-2024-38354 being exploited?

CVE-2024-38354 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-2024-38354 affect?

CVE-2024-38354 affects codimd. Severity is high (CVSS 8.1). CodiMD allows realtime collaborative markdown notes on all platforms. The notebook feature of Hackmd.io permits the rendering of iframe `HTML` tags with an improperly sanitized `name` attribute. This vulnerability enables attackers to perfo

How urgent is CVE-2024-38354?

Priority 42/100. High severity; Public exploit reference

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-2024-38353 MEDIUM 5.3 UPGRADE CodiMD allows realtime collaborative markdown notes on all platforms
CVE-2024-22778 HIGH 7.5 UPGRADE HackMD CodiMD <2.5.2 is vulnerable to Denial of Service.

References

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