CVE-2024-21501: Versions of the package sanitize-html before 2.12.1 are vulnerable to Information Exposure when used on the ba

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MEDIUM 5.3REMOTEUPGRADEMITIGATE

CVE-2024-21501 is a medium-severity flaw (CVSS 5.3) affecting sanitize-html, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Versions of the package sanitize-html before 2.12.1 are vulnerable to Information Exposure when used on the backend and with the style attribute allowed, allowing enumeration of files in the system (including project dependencies). An attacker could exploit this vulnerability to gather details about the file system structure and dependencies of the targeted server.

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	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-200, CWE-538
Published	2024-02-24
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: apostrophecms · fedoraproject

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

Am I affected?

Timeline

2024-02-24 05:15 UTCPublished CVE record published
2026-06-17 07:09 UTCUpdated Record last modified

apostrophecms sanitize-html UPGRADE

Affected: < 2.12.1

Fixed in: 2.12.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls sanitize-html

2. UPGRADE to 2.12.1

npm install sanitize-html@">=2.12.1"

fedoraproject fedora MITIGATE

Affected: 39 · 40

Fixed in: no fixed release known

Safe to downgrade to: a release before 39

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2024-21501?

sanitize-html: upgrade to 2.12.1; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-21501 being exploited?

CVE-2024-21501 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-2024-21501 affect?

CVE-2024-21501 affects sanitize-html, fedora. Severity is medium (CVSS 5.3). Versions of the package sanitize-html before 2.12.1 are vulnerable to Information Exposure when used on the backend and with the style attribute allowed, allowing enumeration of files in the system (including project dependencies). An attac

How urgent is CVE-2024-21501?

Priority 44/100. Public exploit reference; Remotely exploitable, no login, no user action

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References

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