Is CVE-2026-48939 exploited in the wild?

Yes. CVE-2026-48939 is known to be exploited in the wild, first recorded on 10 July 2026. Treat it as urgent.

How severe is CVE-2026-48939?

Critical severity, with a CVSS score of 10, published 20 June 2026.

Which products and versions are affected?

Icagenda.Com iCagenda 1.0.0-3.9.14, 4.0.0-4.0.7.

Is there a fix for CVE-2026-48939?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-48939 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-48939?

Check whether you run Icagenda.Com iCagenda at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-48939: Joomla iCagenda arbitrary file upload in file attachment feature

CVE-2026-48939 · Severity: critical · CVSS 10 · Exploited in the wild · Published 2026-06-20

iCagenda, a popular event management extension for Joomla websites, contains a critical security flaw in its file attachment feature. This vulnerability allows an attacker to upload malicious files to the web server without needing a password. If exploited, an attacker can take full control of the website, potentially stealing sensitive data or disrupting operations.

Technologies: Icagenda.Com iCagenda. Vendors: Icagenda.Com.

Quick answers

Is CVE-2026-48939 exploited in the wild?: Yes. CVE-2026-48939 is known to be exploited in the wild, first recorded on 10 July 2026. Treat it as urgent.
How severe is CVE-2026-48939?: Critical severity, with a CVSS score of 10, published 20 June 2026.
Which products and versions are affected?: Icagenda.Com iCagenda 1.0.0-3.9.14, 4.0.0-4.0.7.
Is there a fix for CVE-2026-48939?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-48939 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-48939?: Check whether you run Icagenda.Com iCagenda at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An unrestricted file upload vulnerability (CWE-434) exists in the iCagenda extension for Joomla within the file attachment functionality. The application fails to properly validate file extensions or content types, allowing unauthenticated remote attackers to upload arbitrary files, including PHP scripts. By accessing the uploaded malicious file, an attacker can achieve remote code execution (RCE) with the privileges of the web server. This vulnerability has been observed being exploited in the wild. Patches are available in versions 3.9.15 and 4.0.8.

Affected products

Joomlic iCagenda 3.2.1 to 3.9.14, 4.0.0 to 4.0.7

Timeline

2026-06-22: advisory: Initial vulnerability details emerged
2026-06-30: other: Initial analysis by NIST/NVD published
2026-07-10: kev added: Added to CISA Known Exploited Vulnerabilities catalog
2026-07-10: disclosed: Final CVE record modification and publication

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