CVE-2018-18840 : What You Need to Know

The SEMCMS PHP V3.4 version contained a cross-site scripting (XSS) vulnerability in the tag_indexmetatit parameter of the SEMCMS_SeoAndTag.php file.

Understanding CVE-2018-18840

What is CVE-2018-18840?

Cross-site scripting (XSS) vulnerability found in SEMCMS PHP V3.4 via the SEMCMS_SeoAndTag.php file.

The Impact of CVE-2018-18840

This vulnerability could allow attackers to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized access or data theft.

Technical Details of CVE-2018-18840

Vulnerability Description

The XSS vulnerability was discovered in the tag_indexmetatit parameter of the SEMCMS_SeoAndTag.php file, accessible through the SEMCMS platform's Class=edit&CF=SeoAndTag feature.

Affected Systems and Versions

Product: SEMCMS PHP V3.4
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

Attackers could exploit this vulnerability by injecting malicious scripts into the tag_indexmetatit parameter, which could then be executed in the context of a user's browser.

Mitigation and Prevention

Immediate Steps to Take

Disable or restrict access to the vulnerable feature or file within the SEMCMS platform.
Implement input validation to sanitize user-supplied data and prevent script injection.
Regularly monitor and audit web application logs for any suspicious activities.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
Stay informed about security updates and patches for the SEMCMS platform to mitigate future risks.

Patching and Updates

Ensure that the SEMCMS platform is kept up to date with the latest security patches and fixes to address known vulnerabilities.