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VULNERABILITIES

CVE-2026-48939 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/Polosss/By-Poloss..-..CVE-2026-48939 CISA-ADPExploitThird Party Advisory
https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/ CISA-ADPThird Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939 CISA-ADPUS Government Resource
https://www.icagenda.com/docs/changelog/icagenda-3-9-15 CISA-ADPRelease Notes
https://www.icagenda.com/docs/changelog/icagenda-4-0-8 CISA-ADPRelease Notes

see all 6 references

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability NameDate AddedDue DateRequired Action
iCagenda Unrestricted Upload of File with Dangerous Type VulnerabilityJul 10, 2026Jul 13, 2026Apply 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.

Weakness Enumeration

CWE-IDCWE NameSource
CWE-434Unrestricted Upload of File with Dangerous Type[email protected]
CWE-434Unrestricted Upload of File with Dangerous Type[email protected]

Affected Products

ProductVersions
joomlic icagenda
>= 3.2.1, < 3.9.15
>= 4.0.0, < 4.0.8

CPE

  • cpe:2.3:a:joomlic:icagenda:*:*:*:*:-:joomla!:*:*

Remediation

  • No remediation found in references.

Change History

13 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-48939
NVD Published Date:
Jun 20, 2026
NVD Last Modified:
Jul 11, 2026
Source:
[email protected]
CVE-2026-48939 Details - Not Deferred