CVE-2026-61900
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedJoomla Extension - dj-extensions.com - Unauthenticated arbitrary file upload in DJ-jDownloads < 4.1.6 - The Joomla extension JDownloads is vulnerable to an unauthenticated file upload, leading to full RCE.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceUnauthenticated arbitrary file upload vulnerability in DJ-jDownloads Joomla extension versions prior to 4.1.6 allows remote attackers to upload malicious files without any authentication, achieving full remote code execution on the affected Joomla instance.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- Authentication
- X
- User interaction
- None
- Scope
- X
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm DJ-jDownloads extension is installedLog into Joomla Administrator panel, navigate to System > Manage > Extensions. Search for 'DJ-jDownloads' or check the Components menu for 'DJ-JDownloads' entry. Alternatively, check your Joomla database '#__extensions' table for an entry with element='com_jdownloads'.Affected if The extension is present in Joomla
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Identify installed DJ-jDownloads versionIn Joomla Administrator, go to Components > DJ-JDownloads > Components > DJ-JDownloads. The version is typically displayed in the component header or footer. Alternatively, locate the file /administrator/components/com_jdownloads/jdownloads.xml and check the <version> tag.Affected if Version is below 4.1.6 (for example, 4.1.5, 4.0.x, or any version prior to 4.1.6)
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Verify upload endpoint is publicly accessibleTest unauthenticated access to the upload functionality. Common paths include /index.php?option=com_jdownloads&task=upload or similar endpoints under /components/com_jdownloads/. Use a web browser or curl to request these paths without providing credentials.Affected if The upload endpoint returns a valid response without requiring login (HTTP 200 instead of redirect to login or 403)
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Inspect upload directories for suspicious filesCheck the jDownloads upload directories (typically /images/jdownloads/ or /media/com_jdownloads/) for recently added files with executable extensions (.php, .phtml, .php5, .exe, .sh). Review file creation timestamps around the time of suspected exploitation.Affected if Unexpected executable files are found in upload directories, especially with recent creation dates
Your environment is affected if DJ-jDownloads extension is installed with a version prior to 4.1.6 and the component is accessible to unauthenticated users.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate DJ-jDownloads to version 4.1.6 or later immediately. If patching is not feasible, disable the extension or implement web application firewall rules to block unauthorized file upload requests until the update can be applied.
- Consultation3.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-61900 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-61900 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data