CVE-2021-39199 is a cross-site scripting (XSS) vulnerability affecting the remark-html Node.js library, which compiles Markdown to HTML. Previously, the library's default configuration did not sanitize user input, allowing arbitrary HTML to be passed through. This medium-severity vulnerability (CVSS 6.1) has a low attack complexity and can lead to information disclosure and integrity issues if a user interacts with a malicious link. There is no evidence of active exploitation, nor is public exploit code available, though it has garnered significant community discussion. Patches in versions 13.0.2 and 14.0.1 now make remark-html safe by default, aligning with its documentation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 13.0.2CPE matchmatch criteria | cpe:2.3:a:remark:remark-html:*:*:*:*:*:node.js:*:* | ||
>= 14.0.0, < 14.0.1CPE matchmatch criteria | cpe:2.3:a:remark:remark-html:*:*:*:*:*:node.js:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.