high CVSS 7.5

CVE-2025-34081·PHP vulnerability

The Contec Co.,Ltd. CONPROSYS HMI System (CHS) exposes a PHP phpinfo() debug page to unauthenticated users that may contain sensitive data useful for an attacker.This issue affects CONPROSYS HMI System (CHS): before 3.7.7.

Severity
high
Software
PHP
Fixed in
3.7.7
Published
2025-07-01

Affected versions

Until: 3.7.7

Fixed in: 3.7.7

How to fix this CVE

CONPROSYS HMI System (CHS) versions prior to 3.7.7 contain an unauthenticated PHP debug information disclosure vulnerability that could expose system configuration, installed modules, and environment variables to unauthorized attackers. Update PHP and CONPROSYS HMI System to version 3.7.7 or later, and disable or restrict access to phpinfo() endpoints through your web server configuration. Additionally, implement network-level access controls to limit exposure of administrative interfaces.

sudo dnf update php php-fpm php-cli php-common

Defensia detects this vulnerability

What an exploitation attempt looks like

Sample log line indicative of exploitation attempts:

GET|POST /phpinfo.php HTTP|GET|POST \?=PHPE9568F36-D428-11d2-A769-00AA001ACF42|GET|POST /info.php|GET|POST /admin/phpinfo

WAF mitigation (if patching is not yet possible)

Add this rule to your WAF to block exploitation attempts while you schedule the patch. 

Block HTTP requests to phpinfo.php, info.php, and requests containing encoded phpinfo identifiers (?=PHPE9568F36). Implement authentication requirements before serving any debug or administrative information pages. Configure the web server to deny direct access to .php files in sensitive directories.

How to check if you are affected

  1. Check installed PHP version: php -v
  2. Verify CONPROSYS HMI System version from the web interface Settings or API endpoint (typically /api/version or /admin/version)
  3. Search access logs for requests to phpinfo.php, info.php, or ?=PHPE9568F36-D428-11d2-A769-00AA001ACF42 (encoded phpinfo requests): grep -i 'phpinfo\|PHPE9568F36' /var/log/apache2/access.log
  4. Confirm the vulnerability is patched by comparing installed versions against the NVD database or running: dpkg -l | grep php (Debian/Ubuntu) or rpm -qa | grep php (RHEL/CentOS)

FAQ

What is CVE-2025-34081?

CVE-2025-34081 is an information disclosure vulnerability in CONPROSYS HMI System (CHS) where an unauthenticated PHP debug page is accessible to remote users, potentially revealing sensitive system configuration, loaded extensions, and environment details that attackers can use for reconnaissance.

Is CVE-2025-34081 being actively exploited?

No, CVE-2025-34081 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog and no public exploits have been released, though the vulnerability is straightforward to discover and exploit.

What versions of PHP/CONPROSYS HMI System are affected by CVE-2025-34081?

CONPROSYS HMI System versions prior to 3.7.7 are affected. The vulnerability applies to systems running any PHP version that has phpinfo() enabled and accessible without authentication.

How do I check if my server is vulnerable to CVE-2025-34081?

Run `php -v` to check your PHP version, then verify CONPROSYS HMI System version in the web interface. Attempt to access the system's phpinfo endpoint via curl (e.g., `curl http://target/phpinfo.php`) without authentication—if you receive PHP configuration output, the system is vulnerable.

Does Defensia detect CVE-2025-34081?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If PHP or CONPROSYS HMI System is installed on a monitored server, CVE-2025-34081 will appear in your dashboard with remediation steps.

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References

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