Vulnerability Details : 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 category: Cross site scripting (XSS)
Products affected by CVE-2021-42048
- cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-42048
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 21 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-42048
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.8
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
1.7
|
2.7
|
NIST |
CWE ids for CVE-2021-42048
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-42048
-
https://phabricator.wikimedia.org/T289064
⚓ T289064 Newcomer homepage Impact module: Permanent XSS exploitable by admins for new accounts (CVE-2021-42048)Patch;Vendor Advisory
-
https://gerrit.wikimedia.org/r/q/Iaa90a8976834d70caad592e9d1b18510318db537
Iaa90a8976834d70caad592e9d1b18510318db537 · Gerrit Code ReviewPatch;Vendor Advisory
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