CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
EPSS
Percentile
40.2%
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.
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
, like so:
- .use(remarkHtml)
+ .use(remarkHtml, {sanitize: true})
n/a
If you have any questions or comments about this advisory:
remark-html
Vendor | Product | Version | CPE |
---|---|---|---|
remark | remark-html | 14.0.0 | cpe:2.3:a:remark:remark-html:14.0.0:*:*:*:*:node.js:*:* |
remark | remark-html | * | cpe:2.3:a:remark:remark-html:*:*:*:*:*:node.js:*:* |
github.com/advisories/GHSA-9q5w-79cv-947m
github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1
github.com/remarkjs/remark-html/releases/tag/14.0.1
github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947m
nvd.nist.gov/vuln/detail/CVE-2021-39199
www.npmjs.com/package/remark-html
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
EPSS
Percentile
40.2%