XSS in Mediawiki

CVE-2021-44855

An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. There is Blind Stored XSS via a URL to the Upload Image feature.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.006 (43.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

  • Mediawiki — versions 1.37.0
  • N/a — versions n/a

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-44855?
CVE-2021-44855 is a medium-severity vulnerability in Mediawiki, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-12-26.
How severe is CVE-2021-44855?
Medium severity. CVSS v3 base score is 5.4 out of 10.