IcagendaApplication · Joomlic
CVE-2026-48939
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 · uneditedA vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
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 confidenceThe iCagenda Joomla extension contains an arbitrary file upload vulnerability in its attachment feature. Attackers can bypass upload controls to upload malicious PHP files, achieving remote code execution on the Joomla server.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
IcagendaApplication
>= 3.2.1, < 3.9.15>= 4.0.0, < 4.0.8CVSS 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
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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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Check installed version of iCagendaLog into your Joomla admin panel and navigate to Extensions > Manage > Manage. Search for 'iCagenda' and note the installed version.Affected if The installed version is >= 3.2.1 and < 3.9.15 or >= 4.0.0 and < 4.0.8.
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Verify file attachment featureReview the iCagenda settings in the Joomla admin panel to confirm if the file attachment feature is enabled.Affected if The file attachment feature is enabled.
You are affected if you have a vulnerable version of iCagenda installed with the file attachment feature enabled.
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.
dbcve · scoped3.9.154.0.8
Restrict the file attachment feature to safe file types (disable PHP uploads entirely), implement server-side content-type and magic-byte validation, store uploads outside the webroot, and disable script execution in the upload directory.
iCagenda 3.9.15 or later for 3.x branches; iCagenda 4.0.8 or later for 4.x branches
- 1. Identify the currently installed iCagenda version by navigating to Components > iCagenda in the Joomla administrator panel.
- 2. If running version 3.x (3.2.1 through 3.9.14), download and install iCagenda version 3.9.15 or later from the official Joomla Extensions Directory or icagenda.com.
- 3. If running version 4.x (4.0.0 through 4.0.7), download and install iCagenda version 4.0.8 or later from the official Joomla Extensions Directory or icagenda.com.
- 4. After upgrading, verify the file attachment feature no longer accepts executable file types (PHP, phtml, .htaccess, etc.).
- 5. Test the extension functionality to ensure the upgrade does not break existing calendar events or attachments.
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Icagenda
Exploited in the wild — priority engagement
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,512.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-48939 — 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-2026-48939 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