Description (CNA)
justhtml versions <= 1.11.0 (fixed in 1.12.0) do not sufficiently escape HTML-significant characters (angle brackets) in text nodes when converting a parsed document to Markdown via to_markdown(). While a small set of Markdown metacharacters are escaped, characters such as < and > are preserved, so untrusted input that is safe in to_html() — including entity-decoded text (e.g. <script>) or text from RCDATA/RAWTEXT-parsed elements like <title>, <textarea>, <noscript>, and <plaintext> — can be emitted as raw HTML in the Markdown output, enabling a sanitizer bypass and potential cross-site scripting when that output is rendered.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| EmilStenstrom / justhtml | affected 0 before 1.12.0; unaffected 1.12.0 |
CWE
CWE-79
References
- https://github.com/EmilStenstrom/justhtml/security/advisories/GHSA-3rcm-vjrc-p45j
- https://www.vulncheck.com/advisories/justhtml-before-sanitizer-bypass-via-markdown
ADP enrichment
No English description supplied.