SugarCRM Remote Code Execution Vulnerability via EmailTemplates Input Validation Bypass (CVE-2023-22952)
Executive & SecOps Summary
SECOPS ASSESSMENTSugarCRM versions prior to 12.0 without Hotfix 91155
Authenticated attackers can inject arbitrary PHP code through crafted requests in the EmailTemplates module, leading to full remote code execution
Apply SugarCRM Hotfix 91155 immediately or upgrade to version 12.0 or later
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Apply Hotfix 91155 or upgrade to a supported secure version (12.0 or higher) via the SugarCRM Support Portal.
# Check current SugarCRM version and patch level
cd /var/www/html/sugarcrm
cat sugar_version.php
# Clear application cache after applying the official hotfix
rm -rf cache/class_map.php cache/Templates/ cache/smarty/2. Temporary Workaround & Hardening Configuration
If patching cannot be performed immediately, configure a Web Application Firewall (WAF) or web server rules to block requests containing PHP payloads targeting the EmailTemplates module.
# Block suspicious PHP code injection attempts in Nginx
location ~* /index.php\?module=EmailTemplates {
if ($request_body ~* '(<\?php|eval\(|base64_decode|system\(|shell_exec\()') {
return 403;
}
fastcgi_pass unix:/var/run/php/php-fpm.sock;
}3. Log Audit & IoC Verification Commands
Scan web server access logs and SugarCRM application logs for indicators of compromise (IoCs) related to this vulnerability.
# Search access logs for suspicious requests targeting EmailTemplates
grep -i 'EmailTemplates' /var/log/nginx/access.log | grep -E '(eval|system|shell_exec|base64)'
# Inspect SugarCRM application logs for execution errors or anomalies
grep -i 'error' /var/www/html/sugarcrm/sugarcrm.log | tail -n 100Block Exploits Instantly with Managed Virtual Patching Rules
Can't patch production immediately? Deploy managed WAF rules at the edge to intercept RCE, SQLi, and deserialization payloads before they hit your origin server.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2023-22952) is a critical input validation (CWE-20) and code injection (CWE-94) flaw residing within the EmailTemplates module of SugarCRM. Due to a lack of proper sanitization and validation of user-supplied input, the application allows authenticated users to inject custom PHP code into email templates.
2. Exploitation Mechanics & Attack Scenario
An authenticated attacker with access to the EmailTemplates module can craft a malicious HTTP request containing PHP code (e.g., <?php system($_GET['cmd']); ?>). Because the application fails to validate this input, the payload is saved to the database or cached on the file system. When the template is subsequently rendered or processed by the server, the injected PHP code executes under the privileges of the web server process.
3. Infrastructure & Business Impact
With a CVSS score of 8.8 and its inclusion in the CISA Known Exploited Vulnerabilities (KEV) catalog, this vulnerability poses an active threat. Successful exploitation allows attackers to gain unauthorized shell access to the underlying server, compromise sensitive customer relationship management (CRM) data, deploy web shells for persistence, and pivot to other internal network resources.
Official Vendor Advisories & References
In SugarCRM before 12.0. Hotfix 91155, a crafted request can inject custom PHP code through the EmailTemplates because of missing input validation.
Frequently Asked SecOps Questions (CVE-2023-22952)
FAQQ1. How critical is CVE-2023-22952 and is it actively exploited in the wild?
CVE-2023-22952 is rated CVSS 8.8 (HIGH) with a 30-day EPSS exploitation probability of 80.1%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2023-22952?
Primary impacted vendors include sugarcrm across sugarcrm. Scope summary: SugarCRM versions prior to 12.0 (all builds lacking Hotfix 91155)
Q3. What temporary mitigations or workarounds exist for CVE-2023-22952 before patching?
[Mitigation] Apply SugarCRM Hotfix 91155 immediately or upgrade to version 12.0 or later Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2023-22952
Instantly format this advisory into an executive CISO summary or engineering patch ticket.
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