# CVE-2026-61900: Joomla Extension - dj-extensions.com - Unauthenticated arbitrary file upload in DJ-jDownloads < 4.1.6

Status: published. Published: 2026-07-20. Updated: 2026-11-12.

Joomla Extension - jdownloads.com - Unauthenticated arbitrary file upload in jDownloads < 4.1.6 - The Joomla extension JDownloads is vulnerable to an unauthenticated file upload, leading to full RCE.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- jdownloads.com / jDownloads extension for Joomla: 4.1.0-4.1.5 (affected). Source: CNA: Joomla

## Severity and prioritization

- CVSS 4.0: 10 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H; source: CNA: Joomla

- CISA KEV: No listing in collected sources

- EPSS: 0.45% as of 2026-11-12; percentile 39.14%

- SSVC: exploitation none; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-434

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.jdownloads.com/ (CNA: Joomla; product)

- https://mysites.guru/blog/jdownloads-4-1-unauthenticated-upload-flaw/ (CNA: Joomla; third-party-advisory)

## Provenance

- CNA: Joomla: https://www.cve.org/CVERecord?id=CVE-2026-61900; retrieved 2026-11-12; source updated 2026-11-12

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-61900; retrieved 2026-11-12; source updated Not reported

Revision: a8bafd47ffc642a832d118b2135b5784b4ca96a9901be6bcce6e637090ddcfc7

Canonical: https://y2.dev/cve/CVE-2026-61900

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.