XSS in Slab Quill
CVE-2021-3163
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
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.013 (69.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Slab Quill — versions 4.8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- quilljs.com (Product)
- burninatorsec.blogspot.com/2021/04/cve-2021-3163-xss-slab-quill-js.html (Exploit, Third Party Advisory)
- github.com/quilljs/quill/issues/3273 (Third Party Advisory, Issue Tracking, Broken Link)
- github.com/quilljs/quill/issues/3364 (Exploit, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2021-3163?
- CVE-2021-3163 is a medium-severity vulnerability in Slab Quill, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-04-12.
- How severe is CVE-2021-3163?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-3163 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.