Threat actors have been exploiting critical vulnerabilities in the Balbooa Forms and iCagenda Joomla extensions that allow unauthenticated attackers to achieve remote code execution (RCE).
The Balbooa flaw, tracked as CVE-2026-56291 (CVSS score of 10), is described as an unauthenticated arbitrary file upload issue affecting the extension’s frontend attachment upload endpoint.
Balbooa Forms version 2.4.1 was released on July 9 with patches for the bug, but threat actors were observed exploiting it in the wild as a zero-day.
The security defect impacts all websites running Balbooa Forms version 2.4.0 or earlier, and the active exploitation prompts immediate action from site administrators.
In June, the iCagenda extension for Joomla was found to be affected by a similar arbitrary file upload vulnerability in the file attachment feature, tracked as CVE-2026-48939 (CVSS score of 10).
As with the Balbooa bug, the iCagenda flaw allows attackers to upload PHP code to a vulnerable deployment and achieve RCE without authentication.
JoomliC, iCagenda’s developer, reportedly observed the CVE being exploited in the wild as a zero-day on June 15. The developer rolled out patches in iCagenda versions 4.0.8 and 3.9.15 on June 15-16.
On July 10, the US cybersecurity agency CISA added both Joomla extension security defects to its Known Exploited Vulnerabilities (KEV) catalog, urging federal agencies to patch them within three days, in line with BOD 26-04 guidance.
While BOD 26-04 applies only to federal agencies, all organizations are advised to review CISA’s KEV list and address the vulnerabilities it identifies as soon as possible.
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