Description (CNA)
DOMPurify versions >=3.0.0 and before 3.4.8, when configured with SAFE_FOR_TEMPLATES together with a DOM output mode (RETURN_DOM, RETURN_DOM_FRAGMENT, or IN_PLACE), fail to strip template expressions (e.g. ${evil}, {{evil}}, <%evil%>) inside <template> element content. The final normalization/scrub pass (_scrubTemplateExpressions) uses a NodeIterator and node.normalize() that do not descend into template.content, so expressions that only form after adjacent text nodes merge survive sanitization. This bypasses SAFE_FOR_TEMPLATES and can allow a downstream template engine to evaluate attacker-supplied expressions. The string output path is not affected.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| cure53 / DOMPurify | affected 3.0.0 before 3.4.8; unaffected 3.4.8 |
CWE
CWE-79
References
- https://github.com/cure53/DOMPurify/security/advisories/GHSA-gvmj-g25r-r7wr
- https://www.vulncheck.com/advisories/dompurify-before-template-expression-injection-via-return-dom
ADP enrichment
No English description supplied.