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6.1 Medium

CVE-2026-63670 ApostropheCMS is an open-source Node.js content management system

Description

ApostropheCMS is an open-source Node.js content management system. Prior to 2.17.6, sanitizeHtml() can pass disallowed executable markup through packages/sanitize-html/index.js when textarea or xmp is included in allowedTags because a literal solidus after the raw-text end-tag name is treated as text by htmlparser2 and the ontext handler emits that content without escaping, while a browser parses the following img onerror markup as active HTML. This issue is fixed in version 2.17.6.

Affected products and versions

Product Affected versions Fixed in
apostrophe 2.17 earliest → < 2.17.6 2.17.6
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