CVE-2021-3163
MEDIUM 6.1EPSS 1.3%
A vulnerability in the HTML editor of Slab Quill 4.8.0 allows an attacker to execute arbitrary JavaScript by storing an XSS payload (a crafted onloadstart attribute of an IMG element) in a text field. Note: Researchers have claimed that this issue is not within the product itself, but is intended behavior in a web browser
- CVSS v3.1 NVD
- 6.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS v3.1 GitHub
- 4.2 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - CVSS v2.0 NVD
- 4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N - EPSS
- 1.31% chance of exploitation in the next 30 days, 70th percentile
- Published
- 2021-04-12
- Updated
- 2024-08-03
Proof-of-concept exploits (1)
- quilljs/quill/issues/336447379★ · 2025-07-25
Security advisories
- https://burninatorsec.blogspot.com/2021/04/cve-2021-3163-xss-slab-quill-js.html
- advisories/GHSA-4943-9vgg-gr5r
- https://quilljs.com