What is CVE-2021-42048?

CVE-2021-42048 is a medium-severity vulnerability in Mediawiki, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2022-09-29.

How severe is CVE-2021-42048?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Mediawiki

CVE-2021-42048

An issue was discovered in the Growth extension in MediaWiki through 1.36.2. Any admin can add arbitrary JavaScript code to the Newcomer home page footer, which can be executed by viewers with zero edits.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.006 (46.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Mediawiki
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)
cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-42048?: CVE-2021-42048 is a medium-severity vulnerability in Mediawiki, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2022-09-29.
How severe is CVE-2021-42048?: Medium severity. CVSS v3 base score is 4.8 out of 10.