CVE-2019-25225

MEDIUM6.1EPSS 0.07%

sanitize-html is vulnerable to XSS through incomprehensive sanitization

Published: 9/8/2025Modified: 9/12/2025

Description

`sanitize-html` prior to version 2.0.0-beta is vulnerable to Cross-site Scripting (XSS). The `sanitizeHtml()` function in `index.js` does not sanitize content when using the custom `transformTags` option, which is intended to convert attribute values into text. As a result, malicious input can be transformed into executable code.

Affected packages (1)

npm/sanitize-htmlfrom 0, < 2.0.0-beta

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References (6)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2019-25225
PATCHhttps://github.com/apostrophecms/sanitize-html
WEBhttps://github.com/apostrophecms/sanitize-html/commit/712cb6895825c8bb6ede71a16b42bade42abcaf3
WEBhttps://github.com/apostrophecms/sanitize-html/issues/293
WEBhttps://github.com/apostrophecms/sanitize-html/pull/156
WEBhttps://github.com/Checkmarx/Vulnerabilities-Proofs-of-Concept/tree/main/2019/CVE-2019-25225