Tóm tắt nhanh
- CVE-2021-39199 là lỗ hổng mức TRUNG BÌNH (CVSS 6.1) ảnh hưởng remark-html (remark), remark-html.
- Xác suất bị khai thác trong 30 ngày tới (EPSS): 1.1%, cao hơn 65.2% các lỗ hổng khác.
- Cách xử lý: cập nhật lên 14.0.1, 13.0.2 hoặc mới hơn.
| Gói / sản phẩm | Phiên bản bị ảnh hưởng | Phiên bản đã vá |
|---|
| remark-html | ≥ 14.0.0, < 14.0.1< 13.0.2
| 14.0.113.0.2
|
| remark-html npm | ≥ 14.0.0, < 14.0.1< 13.0.2
| 14.0.113.0.2
|
Mô tả
Impact
The documentation of remark-html has mentioned that it was safe by default. In practise the default was never safe and had to be opted into. This means arbitrary HTML can be passed through leading to potential XSS attacks.
Patches
The problem has been patched in 13.0.2 and 14.0.1: remark-html is now safe by default, and the implementation matches the documentation.
Workarounds
On older affected versions, pass sanitize: true, like so:
- .use(remarkHtml)
+ .use(remarkHtml, {sanitize: true})
References
n/a
For more information
If you have any questions or comments about this advisory:
Mô tả của NVD
remark-html is an open source nodejs library which compiles Markdown to HTML. In affected versions the documentation of remark-html has mentioned that it was safe by default. In practice the default was never safe and had to be opted into. That is, user input was not sanitized. This means arbitrary HTML can be passed through leading to potential XSS attacks. The problem has been patched in 13.0.2 and 14.0.1: `remark-html` is now safe by default, and the implementation matches the documentation. On older affected versions, pass `sanitize: true` if you cannot update.
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