CVE-2019-16728
dompurify.js - security update
Description
Versions of `dompurify` prior to 2.0.3 are vulnerable to Cross-Site Scripting (XSS). The package has an XSS filter bypass due to Mutation XSS in both Chrome and Safari through a combination of `<svg>`/`<math>` elements and `</p>`/`</br>`. An example payload is: `<svg></p><style><a id="</style><img src=1 onerror=alert(1)>">`. This allows attackers to bypass the XSS protection and execute arbitrary JavaScript in a victim's browser. ## Recommendation Upgrade to version 2.0.3 or later. You may also disallow `<svg>` and `<math>` through `dompurify` configurations: ```DOMPurify.sanitize(input, { FORBID_TAGS: ['svg', 'math'] });```
How to fix CVE-2019-16728
To remediate CVE-2019-16728, upgrade the affected package to a fixed version below.
- —upgrade to 0.8.2~dfsg1-1+deb9u1 or later
- —upgrade to 2.0.3 or later
Is CVE-2019-16728 being exploited?
Low — EPSS is 1.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.8.2~dfsg1-1+deb9u1
- from 0, < 2.0.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |