Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2026-48939

iCagenda extension for Joomla Remote Code Execution

Icagenda.com / iCagenda extension for Joomla · 3.2.1-4.0.7

Watch CVE-2026-48939 Browse KEV feed
Severity
CVSS 10.0 · Critical
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
20.1%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-48939 is an unauthenticated vulnerability affecting Icagenda.com iCagenda extension for Joomla. A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Icagenda.com / iCagenda extension for Joomla 3.2.1-4.0.7.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

iCagenda extension for Joomla Remote Code Execution

A 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.

icagenda.com Affected
iCagenda extension for Joomla
3.2.1-4.0.7
Published
20 Jun 2026
Exploitation Reported
10 Jul 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

joomla php cisa nuclei_scanner

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 10 Jul 2026

A trusted third party reported exploitation.

Proof of concept available

GitHub

Recorded 29 Jun 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
CISA First 2026-07-10 17:00 UTC
CVE 2026-07-10 17:51 UTC
All CISA Advisories 2026-07-10 18:20 UTC
The Hacker News 2026-07-13 07:20 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-48939.yaml 07 Aug 2026

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

10.0 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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:A/AU:Y/U:Red

EPSS

20.1%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Unrestricted Upload of File with Dangerous Type CWE-434

Recent mention · The Hacker News

iCagenda and Balbooa Forms Joomla Flaws Reportedly Exploited as Zero-Days

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two maximum-severity security flaws impacting iCagenda and Balbooa extensions for Joomla to its Known Exploited Vulnerabilities (KEV) catalog, following reports of zero-day exploitation in the...

Read full advisory

All CVSS Scores

CVSS v4.0 10.0 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/E:A/AU:Y/U:Red

CVSS v3.1 9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

All Mentions

Recent mention · The Hacker News

iCagenda and Balbooa Forms Joomla Flaws Reportedly Exploited as Zero-Days

The Hacker News · 13 Jul 2026

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two maximum-severity security flaws impacting iCagenda and Balbooa extensions for Joomla to its Known Exploited Vulnerabilities (KEV) catalog, following reports of zero-day exploitation in the wild. The vulnerabilities, both rated 10.0 on the CVSS scoring system, are below - CVE-2026-48939 - A vulnerability in the

Recent mention · All CISA Advisories

CISA Adds Two Known Exploited Vulnerabilities to Catalog

All CISA Advisories · 10 Jul 2026

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-48939 iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability CVE-2026-56291 Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for...

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

iCagenda unauthenticated file upload RCE in public event submission form

pruva · Created 2026-07-06 18:13:18 UTC

Severity: CRITICAL | CVE: CVE-2026-48939 | Package: iCagenda

Joomla iCagenda < 3.9.10 - Unauthenticated Arbitrary File Upload RCE

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 04:31 UTC

    Nuclei template available

    Scanner coverage available

  2. 07:20 UTC

    KEV confirmed by The Hacker News

    Exploitation attested by an external source

  3. 18:20 UTC

    KEV confirmed by All CISA Advisories

    Exploitation attested by an external source

  4. 17:51 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  5. 17:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  6. 18:13 UTC

    Public PoC available

    Public proof-of-concept code published

  7. 11:56 UTC

    CVE published

    Vulnerability disclosed publicly

  8. 16:47 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-48939

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-48939",
  "confidence": "Confirmed",
  "cvss_score": 10.0,
  "cvss_estimated": false,
  "epss_score": 0.20069,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}