CVE-2026-48939

Published Jun 20, 2026

Last updated 2 months ago

Exploit known CVSS critical 10.0

Netgear

Joomla

iCagenda

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-48939 describes an unrestricted file upload vulnerability found within the iCagenda extension for Joomla. This flaw permits the upload of arbitrary files through the file attachment feature. The vulnerability ultimately enables the upload and execution of PHP code on the affected server. This issue has been added to CISA's Known Exploited Vulnerabilities Catalog, indicating that it is being actively exploited.

Description: 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.
Source: security@joomla.org
NVD status: Analyzed
Products: icagenda

Risk scores

CVSS 4.0

Type: Secondary
Base score: 10
Impact score: -
Exploitability score: -
Vector string: 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/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:Y/R:X/V:X/RE:X/U:Red
Severity: CRITICAL

CVSS 3.1

Type: Primary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

Known exploits

Data from CISA

Vulnerability name: iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability
Exploit added on: Jul 10, 2026
Exploit action due: Jul 13, 2026
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Weaknesses

security@joomla.org: CWE-434
nvd@nist.gov: CWE-434

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:joomlic:icagenda:*:*:*:*:-:joomla\\!:*:*",
            "matchCriteriaId": "7144E5C4-1940-44C7-8EF6-CE9260FC9ECF",
            "versionEndExcluding": "3.9.15",
            "versionStartIncluding": "3.2.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:joomlic:icagenda:*:*:*:*:-:joomla\\!:*:*",
            "matchCriteriaId": "D76CC345-C89F-46E7-9887-F3ADE379E733",
            "versionEndExcluding": "4.0.8",
            "versionStartIncluding": "4.0.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.