CVE-2025-22207: com_scheduler SQL Injection Vulnerability

CVE-2025-22207 Overview

CVE-2025-22207 is a SQL injection vulnerability affecting the Joomla CMS backend task list functionality within the com_scheduler component. The vulnerability stems from improperly built order clauses that allow attackers to inject malicious SQL statements. This flaw enables authenticated administrators to potentially extract sensitive data from the underlying database through crafted requests to the scheduled tasks interface.

Critical Impact

Authenticated attackers with administrative access can exploit improper order clause construction in the com_scheduler component to execute arbitrary SQL queries, potentially leading to unauthorized data disclosure from the Joomla database.

Affected Products

• Joomla CMS with com_scheduler component
• Joomla versions with vulnerable scheduled tasks backend functionality

Discovery Timeline

• 2025-02-18 - CVE CVE-2025-22207 published to NVD
• 2025-02-18 - Last updated in NVD database

Technical Details for CVE-2025-22207

Vulnerability Analysis

This vulnerability is classified as CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), commonly known as SQL Injection. The flaw exists in the backend task list view of the com_scheduler component, where user-controllable input used in ORDER BY clauses is not properly sanitized before being incorporated into SQL queries.

The vulnerability requires an authenticated user with administrative privileges to access the backend scheduled tasks functionality. While this limits the attack surface compared to unauthenticated SQL injection, it still poses a significant risk in multi-administrator environments or when admin credentials are compromised. The impact is primarily focused on data confidentiality, as successful exploitation could allow extraction of database contents including user credentials, session tokens, and other sensitive information stored within the Joomla database.

Root Cause

The root cause of this vulnerability lies in the improper construction of SQL ORDER BY clauses within the com_scheduler component. When building dynamic queries for the task list view, user-supplied sorting parameters are concatenated directly into the SQL statement without adequate validation or parameterization. This allows attackers to break out of the intended ORDER BY context and inject additional SQL syntax, enabling data extraction through techniques such as error-based or time-based blind SQL injection.

Attack Vector

The attack vector is network-based and requires authenticated access to the Joomla administrative backend. An attacker with administrator privileges can navigate to the scheduled tasks component and manipulate the sorting functionality through crafted HTTP requests. By injecting SQL syntax into the order parameters, the attacker can alter the query's behavior to extract data from the database. The attack requires user interaction in the sense that an authenticated session must exist, but the actual exploitation can be automated once access is obtained.

The vulnerability is exploited by manipulating URL parameters or form data associated with the task list sorting functionality. Malicious ORDER BY payloads can include subqueries, CASE statements, or other SQL constructs that conditionally alter the query response, allowing attackers to infer database contents character by character.

Detection Methods for CVE-2025-22207

Indicators of Compromise

• Unusual SQL syntax appearing in web server access logs related to /administrator/ paths containing com_scheduler parameters
• Database query logs showing ORDER BY clauses with unexpected subqueries or CASE statements
• Multiple failed or unusual requests to the scheduled tasks component from administrative accounts
• Suspicious data extraction patterns in database audit logs

Detection Strategies

• Monitor web application firewall (WAF) logs for SQL injection patterns in requests to Joomla backend components
• Implement database activity monitoring to detect anomalous query patterns originating from the Joomla application
• Review Joomla administrator access logs for unusual activity patterns or requests with malformed parameters
• Deploy SentinelOne Singularity to detect behavioral indicators of SQL injection exploitation attempts

Monitoring Recommendations

• Enable detailed logging for the Joomla com_scheduler component and regularly review for anomalies
• Configure database audit logging to capture all queries executed by the Joomla application user
• Implement real-time alerting for SQL error messages that may indicate injection attempts
• Monitor for bulk data access patterns that could indicate successful data exfiltration

How to Mitigate CVE-2025-22207

Immediate Actions Required

• Review the Joomla Security Advisory #958 for official guidance and patching information
• Update Joomla CMS to the latest patched version that addresses this vulnerability
• Audit administrator accounts and remove unnecessary administrative access
• Enable web application firewall rules to filter SQL injection attempts targeting Joomla backend

Patch Information

Joomla has released a security advisory addressing this vulnerability. Administrators should apply the official patch or upgrade to a fixed version as detailed in the Joomla Security Advisory #958. The fix properly sanitizes and parameterizes the ORDER BY clause construction to prevent SQL injection.

Workarounds

• Restrict access to the Joomla administrative backend to trusted IP addresses only using server-level access controls
• Implement additional authentication layers such as two-factor authentication for administrator accounts
• Deploy a web application firewall with SQL injection detection rules as an additional defense layer
• Consider temporarily disabling the scheduled tasks component if not actively used until patching is complete

# Example: Restrict Joomla admin access by IP in Apache .htaccess
<Directory "/var/www/html/administrator">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Directory>