XSS in Requarks Wiki

CVE-2021-43855

Wiki.js is a wiki app built on node.js. Wiki.js 2.5.263 and earlier is vulnerable to stored cross-site scripting through a SVG file upload made via a custom request with a fake MIME type. By creating a crafted SVG file, a malicious Wiki.js…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (58.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-43855?
CVE-2021-43855 is a high-severity vulnerability in Requarks Wiki, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2021-12-27.
How severe is CVE-2021-43855?
High severity. CVSS v3 base score is 8.2 out of 10.
Is CVE-2021-43855 known to be exploited?
3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.