CVE-2026-78074: miniOrange Joomla Auth Bypass Vulnerability

CVE-2026-78074 Overview

CVE-2026-78074 is a broken access control vulnerability affecting free versions of miniOrange extensions for Joomla. A missing authentication check allows unauthenticated remote attackers to delete arbitrary installed extensions from a target Joomla site. The flaw is classified under [CWE-284] Improper Access Control and is exploitable over the network without user interaction or prior credentials.

Critical Impact

Unauthenticated attackers can remotely uninstall arbitrary Joomla extensions, breaking site functionality, disabling security plugins, and enabling follow-on compromise.

Affected Products

• miniOrange Joomla extensions (free versions)
• Joomla sites running vulnerable miniOrange plugin releases
• Any deployment where the affected miniOrange extension endpoints are network-reachable

Discovery Timeline

• 2026-08-31 - CVE-2026-78074 published to NVD
• 2026-08-31 - Last updated in NVD database

Technical Details for CVE-2026-78074

Vulnerability Analysis

The vulnerability exists in the extension management logic exposed by multiple free miniOrange Joomla plugins. The affected endpoints accept requests that trigger uninstallation of Joomla extensions without verifying that the caller is authenticated or authorized. An unauthenticated attacker can invoke the deinstallation function against the target site over HTTP and remove arbitrary installed extensions.

Successful exploitation removes plugin code, associated configuration, and any security controls those plugins enforced. Removing authentication, firewall, or anti-spam extensions creates additional exposure that attackers can chain into further compromise. Only free versions of the miniOrange plugins are affected according to the advisory.

Root Cause

The root cause is a missing authentication and authorization check in the extension uninstallation handler [CWE-284]. The handler processes deinstallation requests directly rather than validating an active administrator session or a valid capability token. Access control was assumed but never enforced in the request path.

Attack Vector

Exploitation requires only network access to the vulnerable Joomla site. The attacker sends a crafted HTTP request to the vulnerable miniOrange extension endpoint specifying a target extension identifier. The server processes the request and uninstalls the specified extension without validating the caller. No credentials, tokens, or user interaction are required.

Refer to the MiniOrange Security Solutions site for vendor advisories and updated release information.

Detection Methods for CVE-2026-78074

Indicators of Compromise

• Unexpected uninstallation entries in the Joomla extension manager log or #__extensions table changes
• HTTP POST or GET requests to miniOrange plugin endpoints originating from unauthenticated sessions
• Sudden disappearance of installed plugins, modules, or templates without an administrator action record
• Web server access logs showing requests to miniOrange extension URLs followed by HTTP 200 responses and no prior authenticated session

Detection Strategies

• Alert on Joomla extension state changes that lack a corresponding authenticated administrator session in application logs
• Monitor web access logs for requests to miniOrange plugin endpoints from IPs with no prior authentication cookie
• Correlate file system deletions under /administrator/components/, /plugins/, and /modules/ with HTTP request telemetry
• Compare a known-good inventory of installed extensions against the live #__extensions table on a scheduled cadence

Monitoring Recommendations

• Ingest Joomla application logs and web server access logs into a centralized SIEM for correlation
• Track HTTP request patterns targeting miniOrange endpoints and baseline expected administrative traffic
• Enable file integrity monitoring on Joomla extension directories to detect unauthorized deletions
• Review outbound and inbound network traffic to the Joomla host for reconnaissance preceding uninstallation attempts

How to Mitigate CVE-2026-78074

Immediate Actions Required

• Identify all Joomla sites running free miniOrange extensions and inventory installed versions
• Restrict network access to Joomla administrator paths and miniOrange plugin endpoints using a web application firewall or IP allowlisting
• Back up the Joomla database and extension directories before applying changes
• Review recent access logs and extension state for evidence of unauthorized uninstallation

Patch Information

Consult the MiniOrange Security Solutions vendor site for updated plugin releases that add the missing authentication check. Upgrade every affected free miniOrange extension to a fixed version once the vendor publishes the patched release. Re-verify the extension state and configuration after upgrading.

Workarounds

• Temporarily disable or uninstall affected free miniOrange extensions until a patched version is applied
• Block unauthenticated requests to miniOrange plugin endpoints at the web application firewall
• Restrict access to /administrator/ and plugin AJAX endpoints to trusted source IP ranges
• Enforce authentication at the reverse proxy layer for administrative components as a compensating control

# Example nginx rule to restrict miniOrange plugin endpoints to trusted IPs
location ~* /components/com_miniorange.*\.php$ {
    allow 203.0.113.0/24;
    deny all;
}