CVE-2026-48939: iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability

CISA Known Exploited Vulnerabilities

Name

iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability

Vendor

iCagenda

Product

iCagenda

Added to the catalog

2026-07-10

Due date for US federal agencies

2026-07-13

Weaknesses

CWE-434

Catalog version

2026.10.30

iCagenda contains an unrestricted upload of file with dangerous type vulnerability that allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.

Required action (CISA)

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.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

• https://www.icagenda.com/#download
• https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
• https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
• https://nvd.nist.gov/vuln/detail/CVE-2026-48939

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2026-06-20T13:16:42.433

Last modified

2026-10-25T23:10:00.167

Weaknesses

CWE-434

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.

References

• https://www.icagenda.com/ (Product)
• https://github.com/Polosss/By-Poloss..-..CVE-2026-48939 (Exploit, Third Party Advisory)
• https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/ (Third Party Advisory)
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939 (US Government Resource)
• https://www.icagenda.com/docs/changelog/icagenda-3-9-15 (Release Notes)
• https://www.icagenda.com/docs/changelog/icagenda-4-0-8 (Release Notes)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:42:31.494Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-48939

CVE record

Title (CNA)

Joomla Extension - icagenda.com - Remote Code Execution in iCaganda extension for Joomla < 4.0.8/3.9.15

Assigner

Joomla

State

PUBLISHED

Published

2026-06-20T11:56:50.752Z

Updated

2026-08-12T13:58:34.869Z

Problem types

CWE-434: Unrestricted Upload of File with Dangerous Type

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.

References

• https://www.icagenda.com/

Read on 2026-11-03T02:20:24.508Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/48xxx/CVE-2026-48939.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

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