What’s Vulnerable › Vulnerabilities

CVE-2024-21501

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-02-24 · updated 2026-06-17
• Weakness: CWE-200

Description

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.

Affected products

• apostrophecms sanitize-html: before 2.12.1 — fixed in 2.12.1
• Fedoraproject Fedora: 39, 40

How to fix

Upgrade to a fixed version: apostrophecms sanitize-html 2.12.1. Check the vendor advisory for mitigations.

References

• https://gist.github.com/Slonser/8b4d061abe6ee1b2e10c7242987674cf
• https://github.com/apostrophecms/apostrophe/discussions/4436
• https://github.com/apostrophecms/sanitize-html/commit/c5dbdf77fe8b836d3bf4554ea39edb45281ec0b4
• https://github.com/apostrophecms/sanitize-html/pull/650
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EB5JPYRCTS64EA5AMV3INHDPI6I4AW7/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P4I5X6V3LYUNBMZ5YOW4BV427TH3IK4S/
• https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-6276557
• https://security.snyk.io/vuln/SNYK-JS-SANITIZEHTML-6256334
• https://gist.github.com/Slonser/8b4d061abe6ee1b2e10c7242987674cf
• https://github.com/apostrophecms/apostrophe/discussions/4436
• https://github.com/apostrophecms/sanitize-html/commit/c5dbdf77fe8b836d3bf4554ea39edb45281ec0b4
• https://github.com/apostrophecms/sanitize-html/pull/650

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