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TI-2021-16572 Aliases CVE-2021-39186

Improper Input Validation in GlobalNewFiles

Priority LOW 29CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.01006 63rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
mirahezeGlobalNewFiles< cee254e—No fix listedCNA
  • GlobalNewFiles Vendormiraheze Affected < cee254e Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:miraheze:globalnewfiles:*:*:*:*:*:mediawiki:*:*before 2021-09-01Vulnerablemiraheze
  • cpe:2.3:a:miraheze:globalnewfiles:*:*:*:*:*:mediawiki:*:* Versions before 2021-09-01 Vulnerable ·miraheze

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-39186

References

Exploit 1

Patch 1

Advisory 1

  • TI-2021-12390 Uncontrolled Resource Consumption in GlobalNewFiles CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences