CVE-2021-39186

Improper Input Validation in GlobalNewFiles

MEDIUM
6.1
CVSS Score
Published: September 1, 2021 at 08:35 PM UTC
Updated: June 17, 2026 at 04:03 AM UTC
1 product affected across 1 vendorGlobalNewFiles

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Severity
MEDIUM6.1
Exploit prediction
EPSS 1%

Description

GlobalNewFiles is a MediaWiki extension maintained by Miraheze. Prior to commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d, the username column of the GlobalNewFiles special page is vulnerable to a stored XSS. Commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d contains a patch. As a workaround, one may disallow <,> (or other characters required to insert html/js) from being used in account names so an XSS is not possible.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2021-09-01
Affected range stops below 2021-09-01, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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