VulnerabilityModified
CVE-2021-42048
Any admin can add arbitrary JavaScript code to the Newcomer home page footer, which can be executed by viewers with zero edits.
MEDIUM 4.8EPSS 0.66%
Does this matter?
Lower severity and a low EPSS score (0.66%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 4.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.66% probability · 50th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- mediawiki/mediawiki
- Source
- cve@mitre.org
References
- https://gerrit.wikimedia.org/r/q/Iaa90a8976834d70caad592e9d1b18510318db537Patch, Vendor Advisory
- https://phabricator.wikimedia.org/T289064Patch, Vendor Advisory
- https://gerrit.wikimedia.org/r/q/Iaa90a8976834d70caad592e9d1b18510318db537Patch, Vendor Advisory
- https://phabricator.wikimedia.org/T289064Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.